https://www.socialeurope.eu/inequality-europe-can-done
https://www.economiesuisse.ch/fr/print/pdf/node/48318
https://papers.ssrn.com/sol3/Delivery.cfm/SSRN_ID3934683_code1082902.pdf?abstractid=3479439&mirid=1
https://verfassungsblog.de/the-good-the-bad-and-the-ugly-2/