Re: Khan being an idiot on this one
You're not looking at this from the view of tax raising politicians. Once smart meters are in place, the general population will be eventually conditioned to paying different rates for electricity used for various purposes (think the already touted demand based tarifs) and there is then nothing to stop the cost of the electricity relating to EV charging rising faster than electricity used for other purposes in the name of road / infrastructure funding, congestion reduction or whatever suits the government's purpose. This would probably be a gradual increase in the way fossil fuel tax increases are gradual so wouldn't amount to political suicide anymore than raising tax on petrol or diesel.
Agreed, the government will probably tax through VED, road charging etc as well but do you honestly believe that they would give up a source of income?