Virtually nobody making 10 million a year pays a 39% tax rate. They likely take most of their comp as stock and pay the long term capital gains rate. If they're in finance/VC, they are taking full advantage of carried interest. They have financial planners who structure their portfolio to favor low-tax investments. They form S-Corps and trust funds to defer tax liability, get paid in distributions, write off all sorts of business expenses, use real estate to offset gains with depreciation, carry forward every conceivable loss, tax loss harvest etc. etc. etc. This is how Warren Buffett, Mitt Romney and Trump end up paying < 20% effective rates.

The people hit hardest by "tax the wealthy" politicians are folks making large salaries (engineers, doctors, lawyers...). The mega-wealthy like Mark Zuckerberg make $1 a year in salary. If you really want to go after the wealthy, you need to tax wealth, not ordinary income and go after the complexity of the tax code.