Not being a member of either major party, this article reinforces the fallacy of the partisan political writer, that his side is purely good and the other side is purely bad.
I immediately found myself asking and answering the companion question in my own mind, "Why does the Right care about income equality?". That answer has nothing to do with laziness, insufficient education, or racial bean-counting:
Forty years or more of big business and government selling American jobs to the highest bidder ten thousand a time via the H1-B visa scam, burdensome laws and regulations, Obamacare, distortive (?) taxation schemes at every level of government, and Statist (Federal Reserve) control in monetary policy and its chummy relationship with all the TBTF banks come to mind immediately.
The simple truth is that there's a huge gap between what people want to get paid for the work they do, and what they're willing to pay others for their work. This is behind almost every business transaction in an economy like ours.