It's them damn dirty little yellow people causing all of this trouble....
...
at least according to Greenspan.
The growing meme of the "savings glut" by those nasty little yellow bastards as the cause of the housing bubble is good in at least one regard -- it's finally breaking through the mainstream consciousness that there is a connection between low interest rates and high home values. (duh!)
Now that they're beginning to admit the obvious (part 1), the obvious (part 2) might come into the equation just a bit.