{"id":6227,"date":"2020-09-02T09:30:02","date_gmt":"2020-09-02T07:30:02","guid":{"rendered":"https:\/\/blog.nccr-onthemove.ch\/?p=6227"},"modified":"2025-03-09T20:51:06","modified_gmt":"2025-03-09T19:51:06","slug":"la-suisse-est-elle-dans-une-situation-de-surpopulation","status":"publish","type":"post","link":"https:\/\/nccr-onthemove.ch\/blog\/la-suisse-est-elle-dans-une-situation-de-surpopulation\/","title":{"rendered":"La Suisse est-elle dans une situation de surpopulation ?"},"content":{"rendered":"<p><strong>Parmi les arguments les plus souvent avanc\u00e9s pour limiter l\u2019immigration en direction de la Suisse, le fait que le pays est surpeupl\u00e9 figure en bonne position. Les logements se rar\u00e9fieraient, la capacit\u00e9 des trains, des routes et des \u00e9coles serait largement d\u00e9pass\u00e9e, et tout cela en raison de l\u2019immigration. Bien s\u00fbr, une croissance d\u00e9mographique n\u00e9cessite des adaptations pour en \u00e9viter les cons\u00e9quences n\u00e9gatives. Mais peut-on parler de \u00ab\u00a0surpopulation\u00a0\u00bb \u00a0?<\/strong><\/p>\n<p>Le concept de surpopulation est difficile \u00e0 d\u00e9finir. Peu d\u2019\u00e9tudes ont \u00e9t\u00e9 publi\u00e9es sur ce sujet en Europe. La litt\u00e9rature existante se penche plut\u00f4t sur les difficult\u00e9s observ\u00e9es dans des cas de d\u00e9clin ou de d\u00e9croissance d\u00e9mographique (qui s\u2019apparente \u00e0 une sous-population), une situation partag\u00e9e par de plus en plus de pays europ\u00e9ens. Ce d\u00e9clin potentiel \u00e9tait largement d\u00e9battu en Suisse il y a 30 ans (Blanc et al. 1985, Geinoz et al. 1989), avant de c\u00e9der sa place \u00e0 la peur de la croissance.<\/p>\n<p><strong>Vers une d\u00e9finition de surpopulation<\/strong><\/p>\n<p>L\u2019 \u00ab\u00a0optimum de population\u00a0\u00bb, qui d\u00e9finit le seuil \u00e0 partir duquel la population est trop nombreuse, repose pour sa part sur des notions difficilement transf\u00e9rables en Suisse : Malthus, Cantillon et leurs disciples faisaient ainsi r\u00e9f\u00e9rence \u00e0 l\u2019aptitude de la plan\u00e8te ou d\u2019une soci\u00e9t\u00e9 \u00e0 subvenir aux besoins fondamentaux de ces habitants, pour d\u00e9finir cet optimum. Les \u00e9conomistes pour leur part ont tenu compte de la productivit\u00e9 : la population est de taille id\u00e9ale lorsque sa croissance d\u00e9mographique permet d\u2019atteindre un optimum de production (cf. Landry, cit\u00e9 par Soriot 2001), de maximiser le revenu individuel moyen ou le bien-\u00eatre individuel et social. Celui-ci peut \u00eatre traduit par diff\u00e9rents indicateurs (\u00e9tat de sant\u00e9, sentiment de s\u00e9curit\u00e9, etc., en fonction des priorit\u00e9s).<\/p>\n<p><strong>L\u2019\u00e9volution de la population suisse<\/strong><\/p>\n<p>Quelle que soit la d\u00e9finition retenue, la Suisse se situe plut\u00f4t bien dans le classement des pays europ\u00e9ens ou mondiaux. \u00c9conomiquement, la Suisse est l\u2019un des pays les plus riches du monde. Du point de vue du bien-\u00eatre, tous les classements mondiaux situent aussi la Suisse dans le peloton de t\u00eate des pays. Quel que soit l\u2019indicateur, aucune d\u00e9t\u00e9rioration significative ne peut \u00eatre associ\u00e9e \u00e0 la croissance des flux migratoires. Certes, des tensions peuvent s\u2019observer dans la population, des insatisfactions peuvent \u00eatre \u00e9voqu\u00e9es, mais elles restent d\u2019un niveau acceptable. Pour ces raisons, avec les quelques \u00e9l\u00e9ments th\u00e9oriques que l\u2019on a \u00e0 disposition, nous pouvons \u00e9carter l\u2019id\u00e9e d\u2019une surpopulation.<\/p>\n<p>Et dans le cas contraire, si la tendance d\u00e9mographique de la Suisse ne r\u00e9pond pas \u00e0 un optimum d\u00e9mographique, que faire ? L\u2019\u00e9volution de la population r\u00e9pond \u00e0 des logiques complexes, li\u00e9es \u00e0 l\u2019accroissement de la dur\u00e9e de vie (on meurt plus tardivement que dans le pass\u00e9), \u00e0 une structure par \u00e2ge comprenant beaucoup de jeunes adultes, ce qui favorise les naissances. Les d\u00e9parts \u00e0 la retraite concernent les g\u00e9n\u00e9rations du baby-boom, qui doivent \u00eatre remplac\u00e9es sur le march\u00e9 du travail, il y a donc des besoins de main-d\u2019\u0153uvre. Vouloir limiter la croissance de la population, dans ce contexte, est difficile. Fermer les fronti\u00e8res, ce sont des h\u00f4pitaux qui se privent d\u2019une main-d\u2019\u0153uvre \u00e9trang\u00e8re n\u00e9cessaire ; ce sont les agriculteurs qui ne peuvent faire face aux travaux de la terre, des commerces qui ne trouvent plus de vendeurs, des restaurants qui ne peuvent plus cuisiner et des multinationales qui ne peuvent plus fonctionner.<\/p>\n<p><strong>Cons\u00e9quences des politiques d\u00e9mographiques<\/strong><\/p>\n<p>Certaines politiques d\u00e9mographiques ou migratoires peuvent modifier la taille et la structure de la population. Cependant, elles pr\u00e9sentent des co\u00fbts importants, sup\u00e9rieurs aux cons\u00e9quences \u00e9conomiques et financi\u00e8res qu\u2019elles sont cens\u00e9es \u00e9viter. \u00c0 l\u2019aide de diff\u00e9rents sc\u00e9narios d\u00e9mographiques, nous avons pu d\u00e9montrer qu\u2019une Suisse \u00e0 10 millions d\u2019habitants pr\u00e9vue pour 2040 pourrait \u00eatre plus profitable en termes de conditions de vie, de coh\u00e9sion sociale et d\u2019\u00e9conomie qu\u2019une Suisse \u00e0 6 ou 7 millions d\u2019habitants (Wanner, 2014). Dans ce sc\u00e9nario-ci, le pays serait confront\u00e9 \u00e0 un niveau de vieillissement important, \u00e0 l\u2019effondrement des syst\u00e8mes de prise en charge des personnes \u00e2g\u00e9es et \u00e0 un manque de main-d\u2019\u0153uvre. En d\u2019autres termes, \u00e0 des cons\u00e9quences beaucoup plus douloureuses que le sentiment d\u2019\u00e9touffement que l\u2019on peut parfois \u2013 hors p\u00e9riode d\u2019\u00e9pid\u00e9mie \u2013 ressentir dans des trains surpeupl\u00e9s.<\/p>\n<p><em><a href=\"https:\/\/nccr-onthemove.ch\/who-is-who\/people\/?start=w&amp;p_id=156\" target=\"_blank\" rel=\"noopener\">Philippe Wanner<\/a> est professeur de d\u00e9mographie \u00e0 l&#8217;Universit\u00e9 de Gen\u00e8ve et directeur adjoint du nccr &#8211; on the move. Il dirige le projet <a href=\"https:\/\/nccr-onthemove.ch\/projects\/explaining-and-interpreting-migration-flows-and-stocks\/\" target=\"_blank\" rel=\"noopener\">Explaining and Interpreting Migration Flows and Stocks<\/a>.<\/em><\/p>\n<p>Bibliographie:<\/p>\n<p>\u2013 Soriot A. (2001). Le conflit entre productivit\u00e9 et rentabilit\u00e9 : le socialisme marginaliste d\u2019Adolphe Landry, <em>\u00c9conomies et Soci\u00e9t\u00e9s, S\u00e9rie \u0152conomia<\/em> 31, 11-12, 1677-1701.<br \/>\n\u2013 Blanc O., Cuenoud C., Diserens M. et al. (1985). <em>Les Suisses vont-ils dispara\u00eetre\u00a0?.<\/em> Berne \/ Stuttgart\u00a0:\u00a0Haupt.<br \/>\n\u2013 Geinoz F., de Siebenthal F., Suarez A. et Tricot M. (1989). <i>Europe\u00a0:\u00a0L\u2019hiver d\u00e9mographique<\/i>. Lausanne : L\u2019\u00e2ge d\u2019homme.<br \/>\n\u2013 Wanner P. (2014). <i>Une Suisse \u00e0 10 millions d\u2019habitants ?<\/i>. Lausanne\u00a0:\u00a0PPUR.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Parmi les arguments les plus souvent avanc\u00e9s pour limiter l\u2019immigration en direction de la Suisse, le fait que le pays est surpeupl\u00e9 figure en bonne position. Les logements se rar\u00e9fieraient, la capacit\u00e9 des trains, des routes et des \u00e9coles serait largement d\u00e9pass\u00e9e, et tout cela en raison de l\u2019immigration. Bien<\/p>\n","protected":false},"author":25,"featured_media":6168,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[827],"tags":[213,432,233,234],"coauthors":[341],"class_list":["post-6227","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-limitation-initiative","tag-demography","tag-initiative","tag-statistics","tag-switzerland"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"La Suisse est-elle r\u00e9ellement surpeupl\u00e9e \u00e0 cause de l&#039;immigration ? 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