California, which desperately wants to reduce air pollution, is going to impose a tax that removes the financial incentive to purchase a vechicle that travels more miles on less pollutants? The idea is, to be perfectly blunt, insane. If California is facing a shortfall due to increased gas mileage, what they need to do is increase the gas price.
This is a sop to everyone who commutes the 80 miles from Antelope Valley to downtown LA in an SUV. The current tax is, in many cases, completely avoidable (drive a smaller car). Don’t start in on the “it hurts the poor”. The working poor in SoCal drive tiny shoebox cars - cars that get 30 to 40 miles to the gallon. There are many of us (the OP and myself, for instance) who, on occasion, need a large heavy vehicle, but, if memory serves, the OP uses as a primary means of transportation a vehicle that gets 35 mpg. If one needs a large automobile to transport things, one ought to be willing to pay the extra costs (or perhaps one does not, in fact, need the large automobile).
This does hurt rural consumers, who presumably get gas mileage that does not include sitting at an idle for 25% of the trip; a gas tax counts, albeit ineffectively, the time spent sitting at stop lights, etc, v. the mileage tax, which would count time spent zipping along highway 114 as equal to crawling along Wislhire blvd at rushhour.
In SoCal, at least, the goals of the gas tax are many. Fund repair of the roads. Garner income for the state. Discourage further air pollution. Internalize the costs of driving. A gas tax does **EVERY ONE OF THOSE THINGS ** better than a mileage tax does, and it does it inexpensively.
There may come a day when a significant number of cars are powered by e.g. batteries, and the gas tax is an inefficent way of handling the problem. When that day comes, we can discuss mileage taxes.
Spending Billions of dollars to avoid the difficulty of selling a tax increase to the voters is simply insane.