I've always wondered why people that honestly fear global warming (or whatever environmental dire straights we'll be in next year) would bitch about high gas prices. If part of the problem is too much pollution from cars then wouldn't it be best to drive less? Or encourage, through the market, people to buy more efficient vehicles? One easy way to do that would be an increased gas tax.
I'm not saying I'm for it (or against it for that matter), but if ones goal is fewer miles driven, then it's a sensible position to take. On the other hand, if you care about the enviroment and bitch about high gas prices, you're an asshole.
Because of the effect on the overall economy. High gas prices drive the cost of everything up due to transportation costs. Furthermore while I strongly support decreasing the number of miles driven simply jacking up the gax tax would be basically putting the carriage before the horse unless we've also already greatly boosted public transportation. Otherwise it'll do nothing but f**k the working poor and lower middle class, as $4/gallon gas did. The solution to this is not as simple as "Jack up gas prices, problem solved" as you seem to be saying.