It doesn't if you tax capital gains properly. It's more important to speak of relative ownership as that reflects the change in power held by the 90% majority of Americans - it's vanishing before your eyes.
And it's a feedback system, next time they choose the red or blue pimp, their ballot will be worth less due to increase in lobbying money held by the 10-1-0.1% - lobbying money used to purchase tax cuts for the same 10-1-0.1%.