Why rich parents are terrified their kids will fall into the "middle class" (Richard V. Reeves, Nathan Joo, Brookings)

Politicians and scholars often lament the persistence of poverty across generations. But affluence persists, too. In the U.S. especially, the top of the income distribution is just as “sticky”, in intergenerational terms, as the bottom. The American upper middle class is reproducing itself quite effectively.

http://www.brookings.edu/blogs/social-mobility-memos/posts/2016/07/12-rich-parents-are-terrified-their-kids-will-fall-into-middle-class-reeves