https://www.ifs.org.uk/uploads/publications/bns/BN243.pdf
https://www.brookings.edu/articles/the-difference-in-how-the-wealthy-make-money-and-pay-taxes/
https://www.boeckler.de/pdf/p_wsi_report_52_2019.pdf
https://www.socialeurope.eu/the-right-macroeconomic-policies-for-a-europe-saving-too-much