If programs like this were to become permanent and widespread across North America it would virtually wipe out the sub $5000 used car from the marketplace. And obviously no more used engines for older vehicles as well if they insist on dealers having to destroy the engine to qualify. An incentive for people who can afford it to buy a more fuel efficient and less polluting vehicle is a great idea, but what are the poorer folks going to drive if cheap old clunkers become scarce? Or is that the whole idea?