"Keynesian economics offered not only an economic explanation of changes in aggregate output and employment, but also a rationale for government intervention to restore an economy mired in depression. Rather than wait for the market to adjust and restore full employment on its own, Keynes argued that government spending could produce the same result faster and with fewer painful side-effects. While Keynes and his followers recognized that government spending entailed the risk of inflation, especially when “full employment” became an official policy, it was a risk they found acceptable and manageable, given the alternative of unemployment on the scale seen during the Great Depression."
January 1, 1970
https://en.wikiquote.org/wiki/Keynesian_economics