It’s not a matter of “nobody should be allowed to be ultra wealthy,”

It kind of is. the more wealth someone has, the more power they have over other people’s life. They can buy laws and regulations, or have them removed. This is never a good thing. Billionaires simply must not exist. In fact, billionaires only exist because we have so many poor people. They profit from other people’s hard labour and misery. If it was not such a historically charged term, I would call them parasites.