What about the student in Ringo’s link (which is basically a transcript of the story I saw on the news)? Students traditionally don’t have a lot of money to begin with. (Yes, he had a BMW before he bought his hybrid; but it could have been a gift instead of something he bought himself.) They frequently have to commute to school. Or take my example of people who moved out of L.A. By your argument it sounds as if you’re saying, ‘Well, they moved farther away. Let them pay more, or move closer to their jobs!’ Which is the same as saying, ‘If you don’t want to pay a mileage tax, why don’t you sell your $100,000 house and move into a $750,000 house in L.A. instead?’ If they could afford to live in an equivalent area in the city, don’t you think people would rather do, instead of spending a couple of hours on the freeway every day?
While a mileage tax may seem fair on its surface, it hits hardest those people who have little or no choice but to drive long distances. As other people have said, the fuel tax is already a use tax. According to the CBS story I saw, fuel taxes are about 25% of the retail price of fuel – currently about 50 cents/gallon.
Governments, especially California’s, want to reduce pollution. They also want to fund the infrastructure. They can’t have it both ways. If people buy more efficient, less-polluting cars, then they’re going to lose fuel tax revenues. If they replace the fuel tax with a mileage tax, people will not have as large an incentive to buy more efficient, less-polluting vehicles.
But both goals need to be achieved. People must switch to more efficient vehicles, and the infrastructure must be maintained. Since both goals must be achieved, how should it be done?
If, as whatsittoya suggests, mileage taxes are paid annually, then millions of people might be hit with a large tax bill. Depending on when they registered their cars, this could be at a very bad time (for example, Christmas or tax time). People who are forced by their financial situations to live far from their jobs or schools will be hit disproportionatly. There would be no incentive to replace gas guzzlers with gas sippers. On the other hand, adding a penny more tax to each gallon of gas purchased would be transparent to the users, as it would be hidden in the normal fluctuations of gas prices. As fuel prices continue to rise, people would be more willing to buy efficient cars.
So a hike in fuel taxes would accomplish both things. More revenues would go to the upkeep of our roads and bridges, and more people would buy less-polluting cars. Money for the roads, fewer emissions in the environment. A mileage tax would only address the revenue, and do nothing about the environment.