According to https://www.weforum.org/reports/global-social-mobility-index-2020-why-economies-benefit-from-fixing-inequality/ https://www.weforum.org/reports/glo

According to https://www.weforum.org/reports/global-social-mobility-index-2020-why-economies-benefit-from-fixing-inequality/ https://www.weforum.org/reports/global-social-mobility-index..., the US ranks 27th in social mobility, behind 21 European countries, and ahead of 14 of them. On the "Education Access" pillar, the Netherlands scored highest, while the US ranks 40th. So I don't think your conclusion is accurate.