[jcampbell1]

If every single american made exactly $50k/year, then the bottom 50% would have zero percent of the wealth (spend everything they make), and the top 10% would consist of frugal people, who save 60% of their income every year and have 70% of the total wealth. In this world where everyone has exactly the same income, there would still be a wealth disparity far more than the estimate and ideal cases. The chart proves that people are bad estimators, and has no basis in actual human behavior.