I'm saying the tax point to alter Ralph's consumption will be well above what Jan can afford with rebates done retroactively, at least initially. And I'm a firm believer that a transfer of wealth at that magnitude may cause an increase in Jan's consumption because she'll be able to afford to consume more. That defeats the purpose of decreasing consumption to lower carbon emissions.You got the dynamics figured out. If $5 a gallon is not enough to reduce consumption, just increase the tax to $10 per gallon. Is it your contention that there is no price at which we would use less gas on aggregate?
Wouldn't it be much easier to just ban the production or importation of any vehicle that can't achieve a fuel efficiency of 52 mpg, which appears to be the best available in 2018?