Many economists who have closely examined growing income inequality over the last half century have emphasized the same factors that we have just outlined. “In the United States,” argue Thomas Piketty, Emmanuel Saez, and Gabriel Zucman, “the stagnation of bottom 50% incomes and the upsurge in the top 1% coincided with reduced progressive taxation, widespread deregulation (particularly in the financial sector), weakened unions, and an erosion of the federal minimum wage.”
