Street charging
>> Put an extension (underground) to the street with a locked cover on it?
I know it's not perfect, but if someone really wanted an electric car this would make things a lot easier. <<
That presupposes that the resident's car will always be parked in the same place. In many towns and cities one is lucky to be able to park within a few minutes' walk of home, and rarely on the same spot.
Charging points that accept money or smart-card payments would work, but require that more or less all streets where parking is allowed have them installed. That would be a massive capital investment.
Quite apart from the matter of actually generating the electricity to charge all those cars.