Richard Reeves writes for Brookings about the extent to which the upper middle class is pulling away from the rest of society. He defines the upper middle class as being in the top quintile (fifth) based on income and tending to have a graduate degree as well.
While such status doesn't make one wealthy, this group's income has been rising while the other 80% have been flat or declining. And the group has political clout as they vote and lobby.
Reeves considers whether they constitute a problem for the rest of society. That is the Brookings' leftist bias showing.
