Comment by rayiner

Okay, but how much tax revenue was raised from those high marginal rates? The top rate is meaningless without knowing how much money that actually brings in for the government. That’s the key part of the analysis for purposes of this discussion.

Aside from a brief blip during WWII, federal tax receipts as a percentage of GDP have been stable at around 17% of GDP, going back to 1950: https://fred.stlouisfed.org/series/FYFRGDA188S. Those high marginal rates never actually raised very much revenue. To close the deficit, we have to get that 17% number up to 23%.

To raise revenue, you need to lower the threshold at which high marginal rates kick in so that you actually capture the fat part of the tax base. About half of all income is earned by people making $100k-800k. That’s around where the heavy tax burden falls in every western european country.