From The Washington Monthly:
The numbers in this chart are all normalized to zero in 1979, and what they show is that the total share of national income going to the super-rich has more than doubled over that time. The merely well off have also gotten a slightly bigger piece of the pie, while everyone else has funded this free-for-all. "Everyone else," in this case, means 90% of the country. Our share of national income has gone down in order to make sure that virtually all the fruits of economic growth over the past four decades could go to the well-off, the rich, and the super-duper-rich.So much for the trickle-down effect, eh?