Since last September, the government's case for bailing out AIG has rested on the notion that the company was too big to fail. If AIG hadn't been rescued, the argument goes, its credit default swap (CDS) obligations would have caused huge losses to its counterparties—and thus provoked a financial collapse.

Last week's news that this was not in fact the motive for AIG's rescue has implications that go well beyond the Obama administration's efforts to regulate CDSs and other derivatives. It's one more example that the administration may be using the financial crisis as a pretext to extend Washington's control of the financial sector.

The truth about the credit default swaps came out last week in a report by TARP Special Inspector General Neil Barofsky. It says that...