Should anyone run a sub-4 minute mile? Should anyone be 7 feet tall? Should anyone make the world's largest pizza? What other outliers are you going to put yourself in charge of regulating?
None of these (except the pizza?) are the result of policy, a billion dollars is. None of these polarize undemocratic power, a billion dollars does. None of them are innate in the sense that they cannot be separated from the person like extreme wealth. Height and athletic ability are neutral in a way that extreme wealth are not. Height and athletic ability are biological and meritorious in a way extreme wealth could never be. These aren't in the same category and cannot be reduced to a value neutral "outlier".
You are missing the point. When you start talking about what "should" be, you imply that there is some authority in charge of deciding the rightness of what is or isn't. Who is that authority? Which bureaucrat in Washington do you want to sit at a desk and decide how much money you are allowed to have?
Right now Jeff Bezos "has" umpty-billion dollars because he owns so many shares of Amazon stock and the market values those shares at a certain amount. So, how do you propose to make him not a billionaire? Are you going to confiscate his shares and hand them over to the government? Would the government be better at running Amazon than Jeff Bezos is? Are you going to pass a law that forbids anyone from buying a share of Amazon for a value any more than what would make Bezos a billionaire? What exactly is the plan here?
People who spout off nonsense like there shouldn't be billionaires, haven't ever though through what that means or what it would imply to make their half-baked notions into a reality.
I'm not missing the point at all. Yes, in short, I believe the government could make that choice. Yes, I believe in redistribution. Taxes are one means for that. Your argument seems to be that literally no one has thought this through, which is patently false. Anyway, we've shifted from a theoretical question about billionaires to a question of practical implementation, which is beyond the scope of an HN comment from a dumbass like me. If you want to know who I think is doing some of the most serious and noteworthy research and writing on this and many other topics related to social welfare and redistribution, check out the People's Policy Project: https://www.peoplespolicyproject.org/