Lawrence Mishel’s recent piece on inequality includes a very telling graph:
We see that the second half of the 1990s is the first prolonged period when the top 1%’s income soared above that of the college educated in general; it coincided with the dot-com boom/bubble. We see a similar takeoff during the mid-2000s housing bubble and stock boom. In the market corrections/crashes that began in 2000 and 2007, we see the top 1%’s advantage mostly, but not completely, disappear.
A combination of stock options, stock-market-based bonuses, and “Takes money to make money” seems to be at work here. The graph seems to be at odds with the common argument (Greg Mankiw’s?) that the top 1% deserve all they get because they are so much more productive, as it seems doubtful that their superior productivity deserts them in bad times.