- Other taxes would have to increase or government spending will fall. (Why do people think tax cuts will make them better off?)
- Help Combat carbon emissions and solve Global Warming
- Already sales of SUV's and Hummers are declining in America. People are choosing more fuel efficient cars. This will help reduce America's long term dependency on oil. See: High Petrol prices see Americans dump their SUVs at the Independent
- Thanks to Brightstar for this link on a transport review suggesting the benefits of increasing tax on petrol
- Americans could do with a bit more exercise - help reduce their obesity problem. 50% of car journeys are less than 2 miles.