Income inequality is a big problem in this country and will lead to big civil issues if it continues in it's current trend. Trump has only exacerbated the problem.
The income-inequality trajectory observed in the United States is largely due to massive educational inequalities, combined with a tax system that grew less progressive despite a surge in top labor compensation since the 1980s, and in top capital incomes in the 2000s. Continental Europe meanwhile saw a lesser decline in its tax progressivity, while wage inequality was also moderated by educational and wage-setting policies that were relatively more favorable to low and middle-income groups. In both regions, income inequality between men and women has declined but remains particularly strong at the top of the distribution.
https://www.vox.com/2018/7/29/176271...equality-chart