More gas tax buzz

I was told that a bunch of economists expressed to the Wall Street Journal that a gas tax was probably the best way to increase America's fuel economy. I think the idea is very interesting, however, only if the tax revenue is used only for clean vehicle tax credits for consumers. Thus, those whom buy E85 would only have to pay 15% of the gas tax, but if they drove a flex-fuel hybrid they would also qualify for a tax credit, such as the one in place for hybrid vehicles today.