>You don't get to be a billionaire by being bad at managing your money, nor do you get to be a billionaire by investing in less productive investments.

Since close to half of America's billionaires inherited their fortunes, that's not really something you can prove. And that fact that it makes money doesn't necessarily mean it's beneficial to society, nor does it even mean it's the most economically productive possible use of resources.

>By taxing the 1%, you are removing money from the most productive investments.

Billionaires aren't the 1%. And "the most productive" investments isn't something you can prove or even make a semi-convincing argument for.

You're going to have a tough row to hoe convincing anyone that the people who make the most money from their investments aren't the best at productively investing money.

1. There's no way to prove that. We aren't a pure meritocracy. There's a huge element of luck to becoming a billionaire. So it's very likely that there are > 600 people out of the 330 million non billionaires who are at least as good or better at investing than the current billionaires.

2. Even if we do assume that the current billionaires are better at making money individually, there are still advantages to collective action. That is to say that taking 10% from the most individually productive members of society and building an interstate system likely produces more societal and economic benefit than whatever they would have done with the that money individually.