"The U.S. spends significantly more on education than other OECD countries. In 2010, the U.S. spent 39 percent more per full-time student for elementary and secondary education than the average for other countries in the Organization for Economic Cooperation and Development, according to the National Center for Education Statistics." This article discusses the american education inequality. It mostly explains racial differences, but there are a few parts when the inequality between classes are being discussed.

"This post first appeared at Economic Policy Institute. In 2014 the pace of job growth picked up, a welcome development. Yet the economy remains far from healthy. The twin issues of income inequality and stagnant wage growth for the vast majority of Americans took center stage. Better late than never." This article explains many of the income inequality. Also explains the productivity of each class, and how much money they get as a result.