Is capitalism really working in the U.S? Wealth inequality is at the highest it's ever been. 

The only reason it seems better is the world economy was completely destroyed after the second world war with over 50% of production taking place in the U.S. 

I would say we don't have capitalism as the state interferes too much to have a free flowing market economy especially considering they bailed out the banks. 

Feels like capitalism for the poor and Quantitative easing and asset buyback for the rich.

Suggested reading Capitalism and Freedom by Milton Friedman 

or Why Government Is the Problem by Milton Friedman

Classic Austrian economist Ludwig Von Mises also alludes to the same.