George Plimpton wrote:

I think there is certainly a PERCEPTION that the wealth is
concentrated in fewer hands, but is it really.

Wealth concentration just doesn't matter in terms of how people live
their lives.
I think that to the extent that Bird-e is talking about it as an
indicator of power concentration in the hands of a few, that it can
matter.

Suppose there is a given distribution of wealth today -
people own whatever they own. Now suppose that some new innovation by
Microsoft causes their stock price to increase 100 times, so that Bill
Gates's fortune is suddenly substantially larger.
jk