
https://www.brookings.edu/articles/the-difference-in-how-the-wealthy-make-money-and-pay-taxes/

https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/2020-05-13_etat_des_lieux_du_financement_de_la_protection_sociale.pdf

https://ukandeu.ac.uk/wp-content/uploads/2023/09/UKICE-Full-Fact-Policy-Landscape-2023.pdf