Does this graph of median income and per capita GDP pretty much say it all?
Check how much is expressed by a pair of line graphs Scroll down to the pair of line graphs. Per capita GDP has been rising fairly steadily over the last 20 years and per median income is about where it started and is heading downward. The rich are getting richer and everyone else is getting poorer.
Look at the two graphs by presidential administration. Under GHW Bush both GDP and median income were falling. Clinton turned things around and got median income to rise in parallel, in a strict geometric sense, with GDP. Under G W Bush GDP continued to rise but median income stagnated. Obama is struggling with Congress to help the little guy while GDP has recovered from the recession and is almost at its pre-recession all time high.