People selectively underestimate how rich the world's richest people are, according to a study. Increasing income inequality in many countries is driven by steep gains among the top 1% of earners. In the United States, support for policies that would redistribute wealth has not increased since the 1970s, even as the share of incomes held by the top 1% of Americans jumped from 10% to 19%.
Their money makes money. If you have enough of a surplus in your income to save money or invest then you are accumulating money faster than the rest of us, and we will likely never catch up.