An economy of Ponzi's

Tom Friedman says it,

I have no sympathy for Madoff. But the fact is, his alleged Ponzi scheme was only slightly more outrageous than the “legal” scheme that Wall Street was running, fueled by cheap credit, low standards and high greed. What do you call giving a worker who makes only $14,000 a year a nothing-down and nothing-to-pay-for-two-years mortgage to buy a $750,000 home, and then bundling that mortgage with 100 others into bonds — which Moody’s or Standard & Poors rate AAA — and then selling them to banks and pension funds the world over? That is what our financial industry was doing. If that isn’t a pyramid scheme, what is?