Professor Glaeser of Harvard University wrote an interesting article, addressing the issue of importance of human capital for economic growth, income and welfare (here):
"Also since the mid-1970s, America has become much more unequal. Not all inequality is bad. I wouldn't mind if the guys who gave us Google earned even more, given their contributions to society. I do, however, care deeply that millions of Americans seem to have reaped, at best, modest benefits from the past 30 years of technological change... By contrast, investing in human capital offers the potential for permanent increases in earnings that encourage work. Education increases the ability to deal with innovation, so that investing in skills today will make Americans better able to weather the storms of future technological changes."