And also this. The top comment has a bunch more information as well.

Wealth under Capitalism is logarithmic, and controlled from the top down. Someone's parents who own two homes are closer to being in your class strata than being billionaires (orders of magnitude wealthier).

There's the lobbying class of wealth, and the voting class. Owning two homes and having low millions still isn't in the lobbying class.

We need to keep the distribution of wealth within certain limits from the poorest to the richest.

The ultra rich are the problem, not the merely very very rich. The wealth GAP is the problem. That gap is due to billionaires, not millionaires.

Traversing the gap from regular person to millionaire is somewhat believable. Traversing the gap between regular person to billionaire - is very unlikely.

Go watch any video, or read a text about how wealth is distributed currently. I don't have it out for millionaires (the petite bourgeoisie, many of whom can see the problem of wealth distribution is unhealthy for everyone), it's the wealth-concentrated couldn't-get-here-without-family billionaires and high millionaires that are the problem.

Finding an appropriate hard limit and defining it in a way that is demonstrably present, exists for a specific reason is a difficult problem. At what point do we limit the range, and what will motivate politicians to install that cap (over taking a bribe) is the problem.