Lion’s tax plan
There’s nothing fundamentally wrong with our tax system. The basic rules for determining what’s income have evolved over the last century and there’s no reason to change that.
I would close loopholes, and I would simplify the tax code by removing as many special deductions and exemptions as possible, and some of the increased revenue from that should be used to lower tax rates for middle-class people, but there’s no reason at this time to change the tax rates for rich people. Rich people have been doing great for the last three decades and they can certainly afford to pay the current tax rates, even minus the loopholes.