This is an extremely simplistic reading of a complex real-world issue. There multiple other factors that almost definitely dominated the changes you cite. Inclu

This is an extremely simplistic reading of a complex real-world issue. There multiple other factors that almost definitely dominated the changes you cite. Including population growth, other massive changes in the regulatory, political, economic, and technical environment... Point being, mentioning one shift in the labor supply is really not a useful frame for "the state of labor in the US."