The Bernie Sanders campaign describes on his campaign website in the section Income Inequality of how Wall Street and the billionaire class have rigged the rules to redistribute wealth and income to the wealthiest and most powerful people of this country.

The White House publishes different [data tables](https://www.whitehouse.gov/omb/budget/Historicals/) related to collected taxes, and one of them shows the percentage paid by individuals and corporations as a percentage of the GDP over time.

Plotting this data in a time series shows that the Vermont senator clearly has a point.