Actually, if you think about it, the existing gas tax does impose a penalty on gas guzzlers, both new and old. The worse a vehicle’s gas mileage is, the more gas the owner must buy, and thus must also pay more tax per mile driven. I’m not saying it’s enough, just that it is a penalty on gas guzzlers. And the EV fees imposed by many states simply replace the gas tax not being paid by the EV driver (even though he is clearly using the public roads and should help to pay for them). Again not a perfect system, but a logical one at any rate.