People should not be allowed to accumulate capital beyond $X, yes. What natural law means they should? Society created the conditions for that person to be so successful; in fact, the person only had the minor part in that success. Once you reach $X, you get a certificate saying you won at life and society is really grateful, and society gets the rest of the rewards while they dedicate their life to philanthropy or torturing kittens or whatever it is they do as a hobby.
> The term "capital" is an abstraction that's not helpful here
It was not so abstract when Musk came up with 44 billion to buy Twitter... The details are complicated but in the end it's still wealth.
> Bezos owns 9% of Amazon stock. That's why he's "rich." What should happen to that stock? What happens to his voting control over Amazon?
Presumably he would sell the stock to pay the wealth tax (or whatever mechanism is there to limit wealth)?
As for the voting control: when you're down to 9% this ship has sailed hasn't it? Anyway I don't think society has a moral obligation to allow individuals personal control of a trillion dollar company because they founded it (and if society disagrees with me, super-voting shares can be used as Alphabet does).
The problem is people that rich don't own anything. It's all shell corporations and LLCs and money borrowed against those shares (so no need to pay any taxes). But they clearly have access to yacht money. We're not going to write an airtight law in the comments section. We can just ignore paper wealth and ownership stakes for the purposes of wealth redistribution.
The question boils down to a feeling that when the revolution comes, that no one person needs more than, say, $100 million for themselves, or not. Trying to distract the conversation into defining "for themselves" will only prolong your time before the firing squad, comrad.
> People should not be allowed to accumulate capital beyond $X, yes.
The term "capital" is an abstraction that's not helpful here. The big "wealth" numbers are all about equity ownership in highly valued companies. Bezos owns 9% of Amazon stock. That's why he's "rich." What should happen to that stock? What happens to his voting control over Amazon?