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.
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.