The feds and the states will increase gas tax if gas prices tumble just to maintain the taxes they’re getting now.
I think the tax is per gallon, not a percentage of the selling price.
The taxes are not a percentage of the price of gasoline, but an “absolute figure” and thus the taxes are the same - regardless. In other words, the revenue from taxes will remain unchanged even if there is a glut of oil. In fact a glut of oil will probably increase the “take” for gasoline, since people will drive a lot more as a result of the glut ... :-) ...
Here’s a map for you ...
http://www.gasbuddy.com/USA_Tax_Map.aspx
The tax is ‘per gallon’. The current ‘debate’ is over the miniscule amount of gas tax not being paid for by electric car owners.
The government solution - pay tax by the mile! And of course, they will require some sort of device to track your miles driven (....and...er...whatever else they need to ‘track’).
Actually they would get more money in taxes as more gasoline is sold even if they keep it at current levels.