Existing taxes per gallon already charge more to those who use more gasoline. Why make it complicated?
Not trying to make it complicated - but to provide a constant incentive to conserve. When gas costs $1 a gallon, there's little incentive to conserve, so people by heavy gas guzzling SUVs rather than fuel efficient station wagons. That makes the potential for supply crunches higher, as the market demands more. Europe has high taxes on gas that encourage conservation (they use a small fraction of the oil per capita that the US does) - but overtaxing is wrong. I'm trying to propose a way that provides a constant, significant incentive to conserve that doesn't cost the average american a thing. Only those who choose to pay more do, and those who choose to conserve get rewarded.