@tokyo_0 In the 1950's, the highest marginal interest rate on income in the U.S. was 91 percent. This forced high earners to reinvest their income or lose it to Uncle Sam. It was 70 percent as recently as Carter. The American economy boomed during that era because the federal government was flush with cash to build projects like the interstate highway system. But no one wants to tax high earners anymore and here we are.