Why are you framing your question as though there aren't 10s of millions of Americans who live somewhere between "billionaire" and "poverty level". They are the <$100k household income level that are paying a bigger % of their income on taxes than Thiel ever will.

And unlike Thiel, they don't have access to accountants that can shuttle their cash away into tax shelters or lobbyists who will buy off politicians for peanuts to get them to vote for even more cuts.