Tax them how though? Honestly, most billionaires don't take a massive salary, many of them have an official salary that is wholly unimpressive. I think Bezos' official salary as CEO of Amazon was under $100k. And I am firmly against the idea of a wealth tax because that means you're taxing someone on money that they don't have. If I find a painting at goodwill that turns out to be worth $100 million, should I be expected to pay taxes on that $100 million even though I only make $20/hour? That would be totally unfair, you'd be taxing me on money I don't have.