Originally Posted by goober

Maybe a course in economics, and a little "Free Market Theory" would help too.
Concentrated wealth is considered an indication of a distorted market, an undistorted market is supposed to produce the widest distribution of wealth, and the least inequality of distribution. A grossly unequal result is an indication of a distorted market, with underlying inefficiencies that produce less net wealth for the society as a whole.

An efficient market will produce unequal results, but on the order of some people making twice as much as others, even ten times as much as others, but when some people are making a million times as much as others, that is an indication that there are distortions that are leading to inefficiencies in the market.
This was something that FDR saw, and he knew that a grossly unequal market system didn't lead to prosperity, it lead to communism.
By implementing market reforms and regulations that addressed the structural defects of the market, a relatively efficient market was put in place that delivered growth, increasing prosperity and an equitable distribution of wealth.
FDR saved capitalism from itself, and unlocked it's power to deliver wealth to the broadest numbers of people.