https://www.socialeurope.eu/2017/06/stronger-pay-increases-are-not-enough/
https://publications.parliament.uk/pa/cm201719/cmselect/cmpubacc/1793/1793.pdf
https://www.sachverstaendigenrat-wirtschaft.de/fileadmin/dateiablage/gutachten/jg201819/JG2018-19_gesamt.pdf