Well in your case as in many others CJ I'm preaching to the converted, but it's not people like you that these things are aimed at It's more to do with making people think, and it's an incentive to under use if you can reap a reward by selling your unused portion. Don't forget that the guy with the Rolls Royce would only get the same as the man with the bicycle, so RR man would have to pay if he wants to consume more.
Seems only fair to me.

G