Income inequality in the United States has been on the rise since 1970, as the wealthy continue to hold more and more wealth and income.Trends and Sources of Income Inequality in the United States: Start Your Search! 
For example, 95% of income gains from 2009 to 2013 went to the top 1% of wage earners in the United States.<!-- This figure is generally misleading on the grounds that it is sourced by one paper from 2013, with data only covering through 2012, before the Great Recession had ended. During recessions and depressions, it is typical that top income earners continue to make a profit, as they tend to be the only people making excess income that they can spare on investments. -->Striking it Richer: The Evolution of Top Incomes in the United States Progressives have recognized that lower union rates, weak policy, globalization, and other drivers have caused the gap in income.Unions, Norms, and the Rise in U.S. Wage Inequality Why is Income Inequality Increasing in the Developed World? Conservatism and the real problems of income inequality: Start Your Search! The rise of income inequality has led Progressives to draft legislation including, but not limited to, reforming Wall Street, reforming the tax code, reforming campaign finance, closing loopholes, and keeping domestic work.The Role of Taxes in Mitigating Income Inequality Across the U.S. States: Start Your Search!
# See also - Wall Street reform