According to a report earlier this month by Bloomberg News, 70 percent of all job gains in the past six months were in four sectors—restaurants and hotels, health care, retail trade, and temporary employment—where low wages prevail.(1)
It's a classic case of of bad math, looking at differences in education and assuming that if everyone is educated the same there will be no inequality(!) In fact most jobs in the future U.S. economy will not require a higher education.
Ultimately, it has to come down to higher wages for working class jobs. Not pretending that an economy can be made up entirely of software engineers and project managers.
1'US slowdown intensifies global economic crisis', WSWS