Moreover correctly paying your taxes starts to get really difficult the more and more money you make: income starts to come from many different sources and figuring it all out is super difficult.
If we drastically simplified the tax code, I think the IRS would collect more taxes, people would pay more taxes, and high earners could easily calculate their tax burden without hiring very expensive professionals. This would unequivocally be a net win, though entrenched interests would never allow it to happen.