Posner thinks it worked:
At a relatively modest, though by ordinary standards very large ($17 billion), cost to the government, the auto companies were kept out of bankruptcy until the acute psychological phase of the economic crisis had passed. Last December, and indeed until sometime in March, government officials, the media, and the public were understandably fearful that the economy was in free fall and might land somewhere near where the economy had landed in March 1933 (25 percent unemployment, output 34 percent below the GDP trend line, 18 percent deflation). Such a fear can constitute a self-fulfilling prophecy, because by causing consumers and producers to hoard cash rather than to spend, it can push the economy into a very deep downward spiral. That fear has now abated.