Income inequality in the United States of America has increased over the past few decades. Along with this development, employee compensation as a share of national income has tended to decline, the profi t share of national income has grown, and inequality within labour has risen. There is no empirical support for the argument that greater inequality has resulted in faster productivity growth, but there is some indication that rising inequality has been connected to slower demand growth. Increased access to credit may have temporarily muted the implications of greater income inequality. Rising U.S. income inequality -- Causes of increase in inequality -- Economic trends in the U.S. -- Inequality and the macroeconomy -- Consumer debt and household economic hardship -- Conclusion.