Is that the right statistics here though? Billionaire classes ability to spend should be compared with governments ability to spend. This is not same as wealth.

That wealth is mostly an unhelpful value based on number of shares in businesses multiplied by that business's share value today. Those businesses are valuable because they do useful things. We can't release that wealth to pay for things. This is the problem with the word "wealth".

Well yes you can sell shares, maybe not all of them at once if you have enough. Still not sure what your point is, that doesn't mean wealth is not extremely unevenly distributed.

Wealth isn't value, it's power.

If you own 3% of Alphabet, you can do things others can't.

"can do things others can't" isn't the thing we want to stop, though. Wealth isn't bad for those who focus on creating value, just as strength isn't bad for those who are in the gym 6 days a week.

It's not healthy to a democracy to have power concentrated, because invariably it leads to a less diverse set of opinions on consequential decisions.

Even if (and big if!) we say that wealth/power-alone doesn't make people think differently, you're sampling from a much smaller population.

And I'd need some convincing on "I don't know how much a gallon of milk costs" not changing a person's perspective.