How many EV's would be covered if the government would cut the $100 Billion in oil spending and redistribute it to other services in the US? Taking this out would just about balance the budget. Of course, you're going to have those that will complain that it's unfair that renewables get rebates and oil doesn't, but then again, they do that already. Hopefully, they plug that drain after EV's take enough foothold so pulling the spending won't crash everything. The government only takes about 50 cents to a dollar per gallon for tax, the rest goes to the oil company.
$100/year isn't bad, but it's probably a loss all the way around just to try to collect it, as stated before. It's not a bad idea, but I feel it's too soon. You know people will blow this out of proportion and stay away from EV's just because of it.