If there are only three or four cars capable of 70 mpg, the gas tax revenue shortfall angle is negligible. But not necessarily a limitation. There’s nothing stopping Washington from coming up with a new tax to replace half the gas tax revenue that would be lost by doubling the gas mileage (presuming every car in the country also doubles their mileage.) Or, just double the existing excise tax. Either way, the working poor will be hit the hardest.
The reason why a Volkswagen that gets 70 miles per gallon can not be sold in the United States is because of government regulation. The real reason is the emission standards as dictated by the EPA and the Obama administration. The penny-pincher on gas emits more ‘pollution’ than what the EPA allows. And the reason for that is the farcical man-made global warming BS coming from what is now known as the environmental movement. Wholly embraced by the Obama administration.
The EPA is one government agency that needs to be reduced to an advisory agency, not a regulatory agency. Congress is our regulatory agency. Or better yet, just eliminate the Environmental Protection Agency and save $8.3 billion a year without them. In ten years time, and without the idiotic baseline budgeting scheme, that represents a saving of $83 billion dollars.