Taxes (currently at historic lows) will go up, and GenX will get paid.
How long so you think you can charge an individual or company an "extra 100M"? Realistically would you stay in a country that suddenly added an extra 100M to your tax bill?
And your numbers are wealth, not income.
Also, there are ~600 billionaires in the US, most of them however would pay $100M tax (and realistically numbers can be adjusted down by stretching over say 100k highest TC individuals rather than 11k like my original statement).
[0] - https://www.fool.com/retirement/2018/10/28/americans-average...