{"id":10594,"date":"2026-02-17T19:33:03","date_gmt":"2026-02-17T18:33:03","guid":{"rendered":"https:\/\/www.api.parlonsfinance.fr\/?p=10594"},"modified":"2026-02-17T19:33:04","modified_gmt":"2026-02-17T18:33:04","slug":"financer-la-guerre-le-pari-economique-americain","status":"publish","type":"post","link":"https:\/\/www.api.parlonsfinance.fr\/index.php\/2026\/02\/17\/financer-la-guerre-le-pari-economique-americain\/","title":{"rendered":"Financer la guerre : le pari \u00e9conomique am\u00e9ricain"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Au printemps 1942, Franklin D. Roosevelt pr\u00e9pare les \u00c9tats-Unis \u00e0 une guerre totale. Les usines doivent produire chars et bombardiers, des millions de soldats partent combattre sur deux continents et l\u2019\u00e9conomie enti\u00e8re bascule vers l\u2019effort militaire. Mais une autre inqui\u00e9tude occupe le pr\u00e9sident : comment financer la guerre sans en transmettre la facture aux g\u00e9n\u00e9rations suivantes. <\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Le conflit co\u00fbte alors l\u2019\u00e9quivalent actuel d\u2019environ 250 millions de dollars par jour. Roosevelt refuse la solution la plus simple l\u2019endettement massif et choisit une voie politiquement risqu\u00e9e : faire payer imm\u00e9diatement. Washington impose une hausse forte de l\u2019imp\u00f4t sur les soci\u00e9t\u00e9s, \u00e9largit sans pr\u00e9c\u00e9dent la base fiscale et applique un taux marginal de 94 % sur les plus hauts revenus. Le principe est clair : la guerre doit \u00eatre ressentie par la soci\u00e9t\u00e9 qui la m\u00e8ne.Le basculement vers la dette<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Huit d\u00e9cennies plus tard, la logique s\u2019est renvers\u00e9e. Les op\u00e9rations militaires am\u00e9ricaines ne sont plus financ\u00e9es par l\u2019imp\u00f4t mais majoritairement par l\u2019emprunt. Les d\u00e9penses sont vot\u00e9es via budgets d\u2019urgence ou cr\u00e9dits exceptionnels puis absorb\u00e9es par la dette publique. Une op\u00e9ration militaire impliquant plus de 15 000 soldats et un groupe a\u00e9ronaval complet peut atteindre environ 31 millions de dollars par jour, soit plus de 11 milliards par an si elle se prolonge, auxquels s\u2019ajoutent la s\u00e9curisation de zones d\u2019influence, la protection d\u2019int\u00e9r\u00eats \u00e9nerg\u00e9tiques ou la pr\u00e9sence strat\u00e9gique permanente. Contrairement \u00e0 la Seconde Guerre mondiale, il n\u2019y a ni rationnement ni hausse fiscale \u00e9quivalente : pour la population, la guerre devient budg\u00e9tairement presque invisible.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">L\u2019exemple irakien : la facture diff\u00e9r\u00e9e<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La guerre d\u2019Irak illustre ce changement d\u2019\u00e9chelle. Au d\u00e9part, le conflit devait co\u00fbter quelques centaines de milliards de dollars ; au total, il atteint environ 4 500 milliards de d\u00e9penses directes et jusqu\u2019\u00e0 8 000 milliards en incluant soins aux v\u00e9t\u00e9rans et int\u00e9r\u00eats. Autrement dit, la guerre continue d\u2019\u00eatre pay\u00e9e des d\u00e9cennies apr\u00e8s la fin des combats. Pendant ce temps, la dette publique am\u00e9ricaine d\u00e9tenue par le public est pass\u00e9e d\u2019environ 33 % du PIB au d\u00e9but des ann\u00e9es 2000 \u00e0 pr\u00e8s de 97 % aujourd\u2019hui.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Lecture du graphique : la guerre comme engagement budg\u00e9taire permanent<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"585\" src=\"https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2026\/02\/image-7-1024x585.png\" alt=\"\" class=\"wp-image-10595\" srcset=\"https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2026\/02\/image-7-1024x585.png 1024w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2026\/02\/image-7-300x171.png 300w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2026\/02\/image-7-768x439.png 768w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2026\/02\/image-7-1536x877.png 1536w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2026\/02\/image-7-1200x685.png 1200w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2026\/02\/image-7-1980x1131.png 1980w, https:\/\/www.api.parlonsfinance.fr\/wp-content\/uploads\/2026\/02\/image-7.png 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Le diagramme met en \u00e9vidence un \u00e9l\u00e9ment central du basculement d\u00e9crit dans l\u2019article : la guerre am\u00e9ricaine du XXI\u1d49 si\u00e8cle n\u2019est plus un choc financier ponctuel mais une structure de d\u00e9penses \u00e9tal\u00e9e dans le temps. Sur un total d\u2019environ 8 000 milliards de dollars, la part directement li\u00e9e aux combats (cr\u00e9dits OCO du D\u00e9partement de la D\u00e9fense : ~2 101 Md$) ne constitue finalement qu\u2019un tiers de la facture. Autrement dit, la bataille elle-m\u00eame n\u2019est plus le c\u0153ur du co\u00fbt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Deux postes dominent d\u00e9sormais :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>les int\u00e9r\u00eats de la dette (~1 087 Md$)<\/strong> : ils traduisent le financement par emprunt. La guerre devient un flux financier futur avant d\u2019\u00eatre une d\u00e9pense pr\u00e9sente ;<\/li>\n\n\n\n<li><strong>la s\u00e9curit\u00e9 int\u00e9rieure (~1 117 Md$)<\/strong> : extension durable de l\u2019\u00c9tat s\u00e9curitaire apr\u00e8s le conflit.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c0 cela s\u2019ajoutent<strong> <\/strong>les soins aux v\u00e9t\u00e9rans (~465 Md$) et surtout les obligations futures estim\u00e9es \u00e0 plus de 2 200 Md$ suppl\u00e9mentaires, qui continueront \u00e0 peser pendant plusieurs d\u00e9cennies. Le graphique montre donc une mutation fondamentale : la d\u00e9pense militaire migre du champ militaire vers le champ social et financier.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En comparaison implicite avec la Seconde Guerre mondiale, le co\u00fbt n\u2019est plus concentr\u00e9 pendant la mobilisation nationale ; il se transforme en engagement budg\u00e9taire interg\u00e9n\u00e9rationnel. La guerre ne s\u2019arr\u00eate plus avec l\u2019armistice : elle devient une ligne permanente du budget f\u00e9d\u00e9ral, comparable \u00e0 une politique publique de long terme.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Une guerre devenue invisible<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ce basculement produit un effet politique majeur : le co\u00fbt imm\u00e9diat dispara\u00eet du d\u00e9bat d\u00e9mocratique. Pendant la Seconde Guerre mondiale, imp\u00f4ts \u00e9lev\u00e9s, obligations de guerre et consommation contrainte rendaient l\u2019effort tangible. Aujourd\u2019hui, l\u2019absence de pr\u00e9l\u00e8vement exceptionnel massif transforme le conflit en d\u00e9pense diff\u00e9r\u00e9e. Financer la guerre par la dette modifie donc les d\u00e9cisions elles-m\u00eames : quand l\u2019imp\u00f4t augmente, la population arbitre ; quand la dette augmente, l\u2019arbitrage est report\u00e9. Le co\u00fbt r\u00e9el appara\u00eet plus tard, sous forme d\u2019int\u00e9r\u00eats, de soins aux v\u00e9t\u00e9rans, de reconstruction militaire et de refinancement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Une question d\u00e9mocratique et g\u00e9n\u00e9rationnelle<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Franklin D. Roosevelt voulait \u00e9viter de transmettre \u00ab plus que leur juste part de sacrifices \u00bb aux g\u00e9n\u00e9rations futures. La doctrine contemporaine fait l\u2019inverse : elle r\u00e9partit les co\u00fbts dans le temps pour pr\u00e9server le pr\u00e9sent. Ce changement d\u00e9passe l\u2019\u00e9conomie et touche au fonctionnement m\u00eame de la d\u00e9mocratie : une soci\u00e9t\u00e9 peut-elle vraiment d\u00e9battre de la guerre si elle n\u2019en ressent pas imm\u00e9diatement le prix ? La puissance militaire n\u2019est plus seulement une question strat\u00e9gique, mais aussi comptable et g\u00e9n\u00e9rationnelle.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Un risque budg\u00e9taire \u00e0 long terme<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cette \u00e9volution pose aussi une question de soutenabilit\u00e9 financi\u00e8re. Plus les conflits et les pr\u00e9sences militaires deviennent permanents, plus ils rigidifient le budget f\u00e9d\u00e9ral. Les int\u00e9r\u00eats de la dette s\u2019ajoutent progressivement aux d\u00e9penses de d\u00e9fense, r\u00e9duisant la marge pour les investissements civils infrastructures, \u00e9ducation ou transition \u00e9nerg\u00e9tique et transformant un choix strat\u00e9gique ponctuel en contrainte budg\u00e9taire durable. Selon le Congressional Budget Office (CBO), la charge d\u2019int\u00e9r\u00eats de la dette f\u00e9d\u00e9rale am\u00e9ricaine figure d\u00e9sormais parmi les postes de d\u00e9penses \u00e0 la croissance la plus rapide du budget et pourrait d\u00e9passer \u00e0 terme certaines d\u00e9penses discr\u00e9tionnaires, y compris des programmes domestiques majeurs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Parall\u00e8lement, les travaux du projet <em>Costs of War<\/em> de l\u2019universit\u00e9 Brown montrent que les conflits post-2001 engendrent des co\u00fbts diff\u00e9r\u00e9s massifs (soins aux v\u00e9t\u00e9rans, int\u00e9r\u00eats sur l\u2019emprunt, maintien capacitaire), confirmant que la guerre devient une d\u00e9pense de long terme plut\u00f4t qu\u2019un choc budg\u00e9taire ponctuel. \u00c0 long terme, la politique \u00e9trang\u00e8re finit ainsi par influencer directement les politiques sociales int\u00e9rieures.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vers un nouveau rapport entre puissance et \u00e9conomie<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Au-del\u00e0 du budget, c\u2019est la nature m\u00eame de la puissance qui change. Autrefois, la guerre impliquait mobilisation industrielle, fiscale et humaine imm\u00e9diate ; aujourd\u2019hui, elle repose davantage sur la capacit\u00e9 d\u2019endettement et la cr\u00e9dibilit\u00e9 financi\u00e8re de l\u2019\u00c9tat. L\u2019\u00e9conomiste Barry Eichengreen souligne que le r\u00f4le international du dollar permet aux \u00c9tats-Unis de soutenir des d\u00e9ficits plus \u00e9lev\u00e9s que les autres puissances sans crise imm\u00e9diate de financement, ce qui modifie les contraintes strat\u00e9giques classiques. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De son c\u00f4t\u00e9, l\u2019historien Adam Tooze d\u00e9crit la puissance am\u00e9ricaine contemporaine comme une puissance \u00ab financi\u00e8re-g\u00e9opolitique \u00bb, o\u00f9 la domination mon\u00e9taire et l\u2019acc\u00e8s aux march\u00e9s de capitaux constituent un \u00e9l\u00e9ment central de la projection de puissance. En d\u2019autres termes, la force strat\u00e9gique ne se mesure plus seulement en divisions ou en porte-avions, mais aussi en capacit\u00e9 \u00e0 repousser dans le temps le co\u00fbt r\u00e9el des d\u00e9cisions pr\u00e9sentes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sources :<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/teachinghistory.org\/history-content\/ask-a-historian\/24489?utm_source=chatgpt.com\"><strong>Taux d\u2019imposition du milieu du XXe si\u00e8cle<\/strong><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/taxproject.org\/marginal-tax-rates-timeline\/?utm_source=chatgpt.com\" title=\"\">Taux marginaux d\u2019imposition : une chronologie historique<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/journalistsresource.org\/economics\/public-debt\/?utm_source=chatgpt.com\" title=\"\">The national debt: How and why the US government borrows money<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/www.brown.edu\/news\/2021-09-01\/costsofwar?utm_source=chatgpt.com\" title=\"\">Costs of the 20-year war on terror: $8 trillion and 900,000 deaths<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/costsofwar.watson.brown.edu\/costs\/economic\/us-federal-budget?utm_source=chatgpt.com\" title=\"\">Costs of War &#8211; U.S. Federal Budget<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Barry Eichengreen : Exorbitant Privilege (r\u00f4le international du dollar)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Adam Tooze : Crashed et travaux sur la puissance financi\u00e8re am\u00e9ricaine<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Au printemps 1942, Franklin D. Roosevelt pr\u00e9pare les \u00c9tats-Unis \u00e0 une guerre totale. Les usines doivent produire chars et bombardiers, des millions de soldats partent combattre sur deux continents et l\u2019\u00e9conomie enti\u00e8re bascule vers l\u2019effort militaire. Mais une autre inqui\u00e9tude occupe le pr\u00e9sident : comment financer la guerre sans en transmettre la facture aux g\u00e9n\u00e9rations [&hellip;]<\/p>\n","protected":false},"author":22,"featured_media":10526,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,14,793],"tags":[7,54,6,5,28],"class_list":["post-10594","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-banque-finance","category-economie","category-highlighted","tag-business","tag-dollars","tag-economie","tag-finance","tag-politique"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Au printemps 1942, Franklin D. Roosevelt pr\u00e9pare les \u00c9tats-Unis \u00e0 une guerre totale. 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