{"id":9131,"date":"2026-05-07T12:52:36","date_gmt":"2026-05-07T10:52:36","guid":{"rendered":"https:\/\/observatoire-hexagone.org\/?p=9131"},"modified":"2026-05-07T12:53:59","modified_gmt":"2026-05-07T10:53:59","slug":"pourquoi-limmigration-ne-paiera-pas-nos-retraites","status":"publish","type":"post","link":"https:\/\/observatoire-hexagone.org\/index.php\/2026\/05\/07\/pourquoi-limmigration-ne-paiera-pas-nos-retraites\/","title":{"rendered":"Pourquoi l\u2019immigration ne paiera pas nos retraites"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><em>Analyse de Philippe Lemoine, directeur de la recherche de l\u2019observatoire Hexagone, et chercheur affili\u00e9 \u00e0 l\u2019universit\u00e9 de Georgetown<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le vieillissement de la population est l\u2019une des tendances marquantes du XXIe si\u00e8cle en Europe. Alors que les plus de 65 ans repr\u00e9sentaient 15% de la population des pays de l\u2019actuelle Union Europ\u00e9enne en l\u2019an 2000, cette proportion est d\u00e9sormais de 20% et devrait continuer \u00e0 s\u2019accro\u00eetre dans les prochaines d\u00e9cennies&#8230; La France ne fait pas exception.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les \u00e9quilibres \u00e9conomiques de nos syst\u00e8mes sociaux sont boulevers\u00e9s par ce ph\u00e9nom\u00e8ne. Ainsi, les plus de 60 ans repr\u00e9sentent 28% de la population du pays, mais au moins 55% de la d\u00e9pense sociale. Ils b\u00e9n\u00e9ficient en premier lieu de notre syst\u00e8me de retraite par r\u00e9partition, financ\u00e9 par les actifs. Alors qu\u2019en 1945, on comptait 6,1 personnes d\u2019\u00e2ge \u00ab actif \u00bb (15-64 ans) pour une seule personne de plus de 65 ans, nous sommes tomb\u00e9s \u00e0 seulement 3,1 actifs aujourd\u2019hui, et la baisse devrait se poursuivre dans les d\u00e9cennies \u00e0 venir pour atteindre environ 2,5 en 2050, si les tendances d\u00e9mographiques actuelles se prolongent. Ce ratio, appel\u00e9 \u00ab ratio de soutien des personnes \u00e2g\u00e9es \u00bb est une m\u00e9trique cruciale dans la planification et le pilotage de nos \u00e9conomies europ\u00e9ennes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Alors qu\u2019il a tendance \u00e0 irr\u00e9m\u00e9diablement se d\u00e9grader, une tentation \u00e9merge dans le d\u00e9bat public, celle de recourir \u00e0 l\u2019immigration. A premi\u00e8re vue, l\u2019id\u00e9e est s\u00e9duisante : accueillir des immigr\u00e9s relativement jeunes pourrait permettre de r\u00e9\u00e9quilibrer le ratio de soutien en \u00e9largissant le nombre de cotisants par retrait\u00e9. Cette intuition ne survit pas \u00e0 un calcul plus approfondi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019enjeu est le suivant : en maintenant notre solde migratoire \u00e0 son niveau moyen des 15 derni\u00e8res ann\u00e9es, pourtant historiquement \u00e9lev\u00e9, notre ratio de soutien tombe \u00e0 2,5 en 2050. Et cette trajectoire inqui\u00e9tante est beaucoup moins sensible \u00e0 l\u2019immigration qu\u2019on ne le croit.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"639\" src=\"https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.35.31-1024x639.png\" alt=\"\" class=\"wp-image-9132\" srcset=\"https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.35.31-1024x639.png 1024w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.35.31-300x187.png 300w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.35.31-768x479.png 768w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.35.31-1536x958.png 1536w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.35.31-2048x1277.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Premi\u00e8rement, si nous voulions nous appuyer sur l\u2019immigration pour neutraliser le vieillissement de la population et avoir en 2050 un ratio de soutien \u00e9gal \u00e0 3, comme aujourd\u2019hui, le nombre de personnes \u00e0 accueillir d\u00e9passerait l\u2019entendement. Il faudrait ainsi augmenter notre solde migratoire non pas de 30%, ni m\u00eame de 50%, mais de&#8230; 250%. A l\u2019heure o\u00f9, d\u2019un sondage \u00e0 l\u2019autre, on observe qu\u2019environ 70% des Fran\u00e7ais trouvent qu\u2019il y a d\u00e9j\u00e0 aujourd\u2019hui trop d\u2019immigration, multiplier cette derni\u00e8re par 3,5 semble irr\u00e9aliste. On parle tout de m\u00eame d\u2019une augmentation du solde migratoire d\u2019environ un demi-million de personnes par an. Et il ne s\u2019agirait pas d\u2019une hausse ponctuelle : le flux devrait se maintenir \u00e0 ce niveau hors-norme chaque ann\u00e9e sur une p\u00e9riode ind\u00e9finie.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"638\" src=\"https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.34.54-1024x638.png\" alt=\"\" class=\"wp-image-9133\" srcset=\"https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.34.54-1024x638.png 1024w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.34.54-300x187.png 300w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.34.54-768x478.png 768w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.34.54-1536x957.png 1536w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/Capture-decran-2026-05-07-a-11.34.54-2048x1275.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Deuxi\u00e8mement, dans un sc\u00e9nario \u00e0 l\u2019extr\u00eame oppos\u00e9, le ratio de soutien ne serait que faiblement modifi\u00e9. En effet, dans un sc\u00e9nario th\u00e9orique o\u00f9 le solde migratoire tomberait subitement \u00e0 z\u00e9ro et s\u2019y maintiendrait sur les prochaines d\u00e9cennies, le ratio de soutien en 2050 reculerait de 2,5 (dans le sc\u00e9nario de stabilisation de notre immigration) \u00e0 2,32. Un \u00e9cart de 7% qui reste tr\u00e8s modeste par rapport \u00e0 l\u2019ampleur de l\u2019effet du vieillissement. Pour le dire autrement, le niveau d\u2019immigration que nous connaissons aujourd\u2019hui, bien que jug\u00e9 excessif par la grande majorit\u00e9 de la population, n\u2019exerce qu\u2019une influence tr\u00e8s limit\u00e9e sur le ratio de soutien des personnes \u00e2g\u00e9es, par rapport \u00e0 un sc\u00e9nario th\u00e9orique sans immigration.La situation observ\u00e9e en France n\u2019a rien d\u2019exceptionnel. Le m\u00eame exercice pour diff\u00e9rents pays europ\u00e9ens, en utilisant \u00e0 nouveau des projections d\u00e9mographiques par la m\u00e9thode des composantes, donne des tendances similaires.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"745\" src=\"https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/HHtOy0xXoAEZKmA-1024x745.jpg\" alt=\"\" class=\"wp-image-9135\" srcset=\"https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/HHtOy0xXoAEZKmA-1024x745.jpg 1024w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/HHtOy0xXoAEZKmA-300x218.jpg 300w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/HHtOy0xXoAEZKmA-768x558.jpg 768w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/HHtOy0xXoAEZKmA-1536x1117.jpg 1536w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/HHtOy0xXoAEZKmA-110x80.jpg 110w, https:\/\/observatoire-hexagone.org\/wp-content\/uploads\/2026\/05\/HHtOy0xXoAEZKmA.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c0 part au Luxembourg, o\u00f9 l\u2019immigration est \u00e0 un niveau anormalement \u00e9lev\u00e9 du fait de la taille du pays, on observe une assez grande variation de l\u2019impact de l\u2019immigration mais celle-ci ne suffit \u00e0 emp\u00eacher le vieillissement nulle part et l\u2019effet reste limit\u00e9 partout. Dit autrement, compter sur l\u2019immigration pour neutraliser l\u2019effet du vieillissement revient \u00e0 faire exploser le solde migratoire dans des proportions in\u00e9dites, quel que soit le pays. En Italie, l\u2019immigration nette devrait \u00eatre multipli\u00e9e par 6. En Espagne, par 10. Gardons \u00e0 l\u2019esprit qu\u2019on ne d\u00e9crit pas ici un pic d\u2019afflux d\u2019immigr\u00e9s, mais un rythme annuel qu\u2019il s\u2019agirait de maintenir pendant des d\u00e9cennies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un tel sc\u00e9nario est \u00e9videmment irr\u00e9aliste.Compte tenu de l\u2019hostilit\u00e9 de l\u2019opinion publique vis-\u00e0-vis d\u2019une hausse de l\u2019afflux d\u2019immigr\u00e9s, on peut douter de l\u2019id\u00e9e que l\u2019impact de l\u2019immigration sur le ratio de soutien en Europe sera sup\u00e9rieur \u00e0 25% d\u2019ici \u00e0 2050. Cette proportion n\u2019aura qu\u2019un effet tr\u00e8s limit\u00e9 sur le vieillissement et n\u2019emp\u00eachera pas les Europ\u00e9ens de devoir faire des choix difficiles pour s\u2019y adapter. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019id\u00e9e que \u00ab l\u2019immigration paiera nos retraites \u00bb est donc non seulement fausse, mais elle est aussi nuisible \u00e0 la r\u00e9forme et \u00e0 la planification de nos politiques sociales. Notre syst\u00e8me de retraite, d\u00e9j\u00e0 d\u00e9s\u00e9quilibr\u00e9 aujourd\u2019hui, devra \u00eatre imp\u00e9rativement r\u00e9form\u00e9. Cessons de nous bercer d\u2019illusions et acceptons de regarder enfin la r\u00e9alit\u00e9 en face.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Analyse de Philippe Lemoine, directeur de la recherche de l\u2019observatoire Hexagone, et chercheur affili\u00e9 \u00e0 l\u2019universit\u00e9 de Georgetown Le vieillissement de la population est l\u2019une des tendances marquantes du XXIe si\u00e8cle en Europe. Alors que les plus de 65 ans repr\u00e9sentaient 15% de la population des pays de l\u2019actuelle Union Europ\u00e9enne en l\u2019an 2000, cette [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":9138,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,6],"tags":[50],"class_list":["post-9131","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-economie","category-sujets-regaliens","tag-une"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pourquoi l\u2019immigration ne paiera pas nos retraites - Hexagone | La France en chiffres<\/title>\n<meta name=\"description\" content=\"Analyse de Philippe Lemoine, directeur de la recherche de l\u2019observatoire Hexagone, et chercheur affili\u00e9 \u00e0 l\u2019universit\u00e9 de Georgetown Le vieillissement de\" 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