... that Cash for Clunkers was yet another horrible government idea, read this.
The basic fallacy of cash for clunkers is that you can somehow create wealth by destroying existing assets that are still productive, in this case cars that still work. Under the program, auto dealers were required to destroy the car engines of trade-ins with a sodium silicate solution, then smash them and send them to the junk yard. As the journalist Henry Hazlitt wrote in his classic, "Economics in One Lesson," you can't raise living standards by breaking windows so some people can get jobs repairing them.
In the category of all-time dumb ideas, cash for clunkers rivals the New Deal brainstorm to slaughter pigs to raise pork prices. The people who really belong in the junk yard are the wizards in Washington who peddled this economic malarkey.
If you're thinking, "but, still, it did something great for the environment!", think again: the upgrade to more fuel efficient models saved maybe one day's worth of gas consumption.
Go read the whole thing.