Wow... you are in favor of a tax where your every move is taxed? Talk about big brother interfering in your life. You must be kidding?
A mileage tax is a tax levied for road usage. It would be the closest thing we have to a tax that actually charges users for the wear-and-tear on roads they are directly responsible for. The major problem with this kind of scheme is administrative expenses. Which is why an unfair flat tax regardless of mileage on electric vehicles is likely to be the "solution".