The first finds that rising income inequality in the United States means that the benefits of better productivity are accruing mainly to the very wealthy. The EPI offers this startling nugget of data as basic food for thought: U.S. productivity grew 80.4 percent from 1973 to 2011, while average hourly compensation rose just 39.2 percent in the same period, and median compensation, which excludes outliers, gained a paltry 10.7 percent.