When we had a booming economy, a vibrant middle class and were consistently paying off the national debt from WWII the top bracket was over 70% from 1933 to 1981, see for yourself. $509,300 is enough for any household, tax everything above that at a minimum of 50%. This is needed for the common good, a concept conveniently forgotten.

https://files.taxfoundation.org/legacy/docs/fed_individual_rate_history_nominal.pdf