A range of data after the recession and the housing bust supported the idea that only a tiny elite of U.S. society, generally seen as the top 1%, had rebounded and was doing well.From the abstract to the "The Growing Size and Incomes of the Upper Middle Class" by Stephen Rose:
But a growing body of evidence suggests the economic expansion since the 2007-2009 financial crisis has enriched a much larger swath of the upper middle class, and that a deeper income divide is developing between that top quarter or so of the population and everyone else.
The latest piece of evidence comes from economist Stephen Rose of the Urban Institute, who finds in new research that the upper middle class in the U.S. is larger and richer than it’s ever been. He finds the upper middle class has expanded from about 12% of the population in 1979 to a new record of nearly 30% as of 2014.
This report uses absolute income thresholds adjusted for inflation and family size to show that the size of the upper middle class grew from 12.9 percent of the population in 1979 to 29.4 percent in 2014. In terms of shares of total income, the middle class controlled a bit more than 46 percent of all incomes in 1979, while the upper middle class and rich controlled 30 percent. By 2014, the rich and upper middle class controlled 63 percent of all incomes, while the middle class share had shrunk to 26 percent.