Re: I've been pointing this out for years.
True. Look what happened to low diesel fuel tax untill there were enough diesel users 'hooked'.
It was increased so that the diesel price is now more than petrol. I imagine the increase in diesel efficiency (in mpg) is now completely offset resulting in no loss of income to the taxman.
The same thing will happen with electricity costs. A way will be found to tax electricity for road use (EERV?) to make up the shortfall. There will only be a brief window where electic cars will be cheaper to run. Death and Taxes.