America’s Convoluted Tax System

Tax Burden Equal to 70% Rate Crushes Americans Unable to Pay It
https://www.bloomberg.com/news/articles/2020-10-15/tax-burden-equal-to-70-rate-crushes-americans-unable-to-pay-it
 
Marginal Net Taxation of Americans' Labor Supply
https://www.nber.org/papers/w27164.pdf