Sometimes I don't know what to think of threads like these.
There's a seeming intellectual bunch trying to explain the meaning of life to dumb animals.
Or is it
There's a seeming intellectual bunch toying with dumb animals.
Or is it
There's a seeming intellectual bunch who actually don't realise that by toying with dumb animals makes them a dumb animal.
I'm bored..
This is one of those arguments where deep down inside we all know that the 'intellectuals' are right. The car is unsustainable and it's negatives are outweighing the positives. However (and here's the rub), there's a time and cost factor involved in getting from where we are to where we will need to be. That's uncomfortable and difficult for some, easier for others.
For example I've always lived near to where I work, however, I've always had company moves to sweeten the pill.
I have 3 children who have schooloing needs, this is a complexity in re-locating.
I've nearly always had company funded cars, this means I have more freedom of choice where I live relative to work.
However, for others it's different. For example, being single and renting gives more flexibility and less investment than having a family of five, in the short-term that's a far easier proposition to adopt to a car-less future, whereas for others it's much harder proposition.
To go back to the OP question. I think cutting car-fuel cost is NOT a sensible option even in these troubled times. Car fuel cost need to rise albeit gently to apply pressure on people to re-think their options and priorities, but it won't and it shouldn't happen overnight, but it needs to happen just the same.