https://www.boeckler.de/fpdf/HBS-008396/p_imk_pb_132_2022.pdf
https://www.socialeurope.eu/progressive-taxation-for-a-renewed-social-contract
https://www.socialeurope.eu/greek-economy-recovering-exiting-crisis
https://www.socialeurope.eu/2017/05/rethinking-german-economic-policy/