It is possible to generate electricity from sources other than fossil fuels.

It is not possible to drive a combustion engine from sources other than fossil fuels (except in very rare circumstances).

Removing fossil-fuel burning cars from the road reduces the national fuel burden, making the generation of electricity cheaper.

That's a pretty short termist comment.. this is part of the plan to tackle and reduce co2 emissions and has nothing to do with reducing overall costs.. besides, I don't know if you noticed but electricity is not the only form of energy which has skyrocketed in price, gas/diesel has is currently very expensive in Europe as well. Since your alternative (ice vehicle) has become proportionally as expensive, the cost benefit of electric cars still holds.