Actually it would in the long run. It would force all the automakers into bankruptcy, in which the US government would get the honor of eating all the bad debt Ford and GM have, finally giving the companies a government sponsored break. They would reemerge from bankruptcy rather fast, (Ford would anyway, GM notsomuch) and be much more competitive. It's not like I'm looking forward to it, but the best way to cut the fat is to starve.