Perhaps they will give incentives to buy crappy American cars and disincentives to buy Asian cars. At that point it will be financially difficult for Americans to buy better foreign cars. Then the American companies will cut production of all cars that have efficient gas milage while still labeling them as efficient (e.g., hybrid). I have noted that the so-called hybrid American cars really don't have much better gas efficiency, while many of the Japanese hybrids have significantly increased gas efficiency (e.g., Prius, Insight).