Paul Krugman dissects Friedman, here.
Milton Friedman often assured audiences that no special institutions, like minimum wages and unions, were needed to ensure that workers would share in the benefits of economic growth. In 1976 he told Newsweek readers that tales of the evil done by the robber barons were pure myth:
There is probably no other period in history, in this or any other country, in which the ordinary man had as large an increase in his standard of living as in the period between the Civil War and the First World War, when unrestrained individualism was most rugged.
(What about the remarkable thirty-year stretch after World War II, which encompassed much of Friedman’s own career?) Yet in the decades that followed that pronouncement, as the minimum wage was allowed to fall behind inflation and unions largely disappeared as an important factor in the private sector, working Americans saw their fortunes lag behind growth in the economy as a whole. Was Friedman too sanguine about the generosity of the invisible hand?
H/T Ezra Klein