Good research to support what we already knew.
The revived discussion of strengthening the middle class, however, has so far failed to drill down to the central problem: The wage and benefit growth of the vast majority, including white-collar and blue-collar workers and those with and without a college degree, has stagnated, as the fruits of overall growth have accrued disproportionately to the richest households. The wage-setting mechanism has been broken for a generation but has particularly faltered in the last 10 years, once the robust wage growth of the late 1990s subsided. Corporate profits, on the other hand, are at historic highs. Income growth has been captured by those in the top 1 percent, driven by high profitability and by the tremendous wage growth among executives and in the finance sector (for more on wage and income growth among the top 1 percent, see Bivens and Mishel 2013).