David Brooks ponders the causes of our culture of debt. And it's not just predatory lenders.

Norms changed and people began making jokes to make illicit things seem normal. Instead of condemning hyper-consumerism, they made quips about “retail therapy,” or repeated the line that Morgenson noted in her article: When the going gets tough, the tough go shopping.

McLeod and the lenders were not only shaped by deteriorating norms, they helped degrade them. Despite all the subterranean social influences, there still is that final stage of decision-making when individual choice matters. Each time an avid lender struck a deal with an avid borrower, it reinforced a new definition of acceptable behavior for neighbors, family and friends. In a community, behavior sets off ripples. Every decision is a public contribution or a destructive act.

And now the reckoning has come. The turn in the market punishes many of those seduced by financial temptations. (Sometimes capitalism undermines the Puritan virtues, but sometimes it reinforces them.)