Ezra Klein - Research desk investigates: How does college explain unemployment numbers, but not inequality?

Ezra Klein - Research desk investigates: How does college explain unemployment numbers, but not inequality?: "But the anecdotal stories of the PhD's who can't find jobs in this climate aside, economists documenting the growing income gap (Saez, Krugman) have shown that the College-High School wage ratio doesn't do much to explain inequality."?