Assuming (perhaps incorrectly) you are in the US, you are also reading Hacker News, so you are probably the top 1% of the worlds wealthiest. Again, just a thought experiment, but would you be fine with your government saying that as a 1 percenter in world wealth you can no longer earn anymore, you have hit that certain point, are a fat cat and can grow no more wealth, under threat of criminal law?
Media has done a good job of raising awareness of the problems of wealth disparity, and a lot of people nod along.
But no matter how wealthy someone is, they can always point to the more-rich and say those people are the problem and should be taxed, not themselves.
This is obviously untrue. There isn't an infinite number of people wealthier than Gates or the Waltons or the Rothschilds. At some point there is no one further up the economic ladder in whatever location you're talking about.
Obliterate the tax shelters, obliterate the tax havens, bring the money back home under threat of criminal law.
I'm not saying you can't be a fat cat. But at a certain point (fluid and blurry, but distinctly present), it's just morbid obesity that is squishing other citizens.