mobility
one stat i'd like to see is a measure of mobility. how many people actually cross the line between rich and poor? clearly, there are gonna be a lot more poor people than rich people. but society would be a lot happier if more people got a turn being rich. instead of rich people staying rich. and poor people staying poor. hopelessly. leads to revolution. fortunately revolutions in a democracy are generally of the political kind. the top tax bracket during fdr's day was 90%. think about it.