A common argument is that relative levels of wealth don't matter too much. Does it really matter if there is some Billionaire's if the average person is doing w

A common argument is that relative levels of wealth don't matter too much. Does it really matter if there is some Billionaire's if the average person is doing well for themselves ? It's the average persons absolute amount of wealth going up that matters. I think the real question is: Is an uneven distribution necessary to drive absolute levels of wealth up more quickly ? What level of wealth inequality produces the most growth ?