[webXL]

Oh, believe me, there's room to be taxed: https://www.washingtonpost.com/news/wonk/wp/2015/03/24/how-y... ;)

Some people look at that map and think "look at all that income just being disposed of! Just think of what governments could do with all that cash!"

[SilasX]

Those people are wrong, and there isn't room: tax revenues has been roughly constant across enormously varying [1] rates. An increase in rates will scare marginal workers (people near retirement, moonlighters, the lower-earning member of a couple) off the labor market, and direct more efforts into reclassifying consumption as a business expense, canceling much of the increase in revenues, while leaving significant economic waste in its wake.

[1] https://en.wikipedia.org/wiki/Hauser%27s_law