Bill Gates — the second richest person in the world with a current net worth of $108.8 billion, according to Forbes — says his extreme wealth is not fair.

"The distance between top and bottom incomes in the United States is much greater than it was 50 years ago," Gates wrote in a blog post reflecting on 2019 published Tuesday. (Indeed, American income inequality is at its highest level in decades, according to U.S. Census Bureau's Gini index.)