Given that the tax structure massively prefers capital gains to other forms of income, it is unreliable to look at the reported tax percentages as a measure of where the money is actually coming from. For example, many of the uber-rich structure payments for their labor such that they are taxed as capital gains.
Exactly, the article is ignoring any sort of cause and effect for why the numbers are the way they are. If the US changed tax policy to favor other types of income, how the rich divide their income would change to fit.
