The elephant in the room is extreme income inequality. How big is this elephant? A staggering $50 trillion. That is how much the upward redistribution of income has cost American workers over the past several decades ... according to a groundbreaking new working paper by Carter C. Price and Kathryn Edwards of the RAND Corporation. Had the more equitable income distributions of the three decades following World War II (1945 through 1974) merely held steady, the aggregate annual income of Americans earning below the 90th percentile would have been $2.5 trillion higher in the year 2018 alone. That is an amount equal to nearly 12 percent of GDP - enough to more than double median income - enough to pay every single working American in the bottom nine deciles an additional $1,144 a month. Price and Edwards calculate that the cumulative tab for our four-decade-long experiment in radical inequality had grown to over $47 trillion from 1975 through 2018. As a result, the top 1 percent's share of total taxable income has more than doubled, from 9 percent in 1975, to 22 percent in 2018, while the bottom 90 percent have seen their income share fall, from 67 percent to 50 percent. This represents a direct transfer of income ... from the vast majority of working Americans to a handful at the very top. A 2014 report from the OECD estimated that rising income inequality knocked as much 9 points off U.S. GDP growth over the previous two decades.