Rich Get Richer, Poor Get Poorer - Senator Bernie Sanders of Vermont
Tina Miller, MA,CFLE stashed this in p2
This is called a "winner take all" system.
It's a virtuous cycle for some, and a vicious cycle for others.
Whatever you are, you will be more of.
But you can't do percentile math without also doing the aggregate: the "bottom 90%" made a combined income of about $8.4Trillion where the top 0.01% made a combined income of about $640B.... presuming these numbers are accurate...