Lane Kenworthy has updated his Best Inequality Graph with the latest data (through 2007):
Hidden in the fine print, you’ll find proof positive that trickle-down works: middle-class incomes have risen by 1% a year since 1979! And poor people’s incomes have gone up by 0.4% a year.
How can you argue with that kind of rampant, precipitous prosperity growth?
(Note that these are post-tax, post-transfer incomes.)