> How about this: fleet efficiency standards are stupid, anachronistic and counterproductive. Scrap them. Then, separarately, create a consumer-side rebate based on a vehicle's mileage. (Because a gas tax breaks American brains.)

It's a good concept that is also ripe for abuse with anyone who has some amount of "fuck your rules" money. Same reason why fines that don't scale with income/earnings in some form often do nothing to deter "the rich".

I certainly like carrots more than sticks, but we need a couple of sticks as well.