Because the current tax code is designed for him, not drag. That's what I would like to change if I was elected benevolent dictator for life with no risk of being deposed by the oligarchs. For the super wealthy, tax all assets, for the super poor, tax nothing and give UBI, and for the working and middle class, a fair progressive income tax, and property tax on homes you don't live in year-round, but none on your primary residence. In terms of income tax, the tax brackets would go up slowly at first and then ramp up really high. Someone making 100k a year should pay roughly what they pay now, those making less should pay less, and those making 500k+ a year should pay a lot more than they pay now.