Definition: In this task, you are given a statement spoken by a politician in natural language. Your task is to generate the subject of the discussion for the given statement. The subject generated is not necessarily a part of the given input. Your answer should contain one or more words.
Input: According to David Cay Johnston, the average American pays about 22 percent of their income to federal taxes. The richest 400 Americans pay about 16 percent of their income to federal taxes.

taxes