The sad part is the current state of water affairs is so far from this. Discounted commerical water rates (liable to change when your local representative gets a donation from industry), unclear water usage by individuals (how many folks really know how much water they use when?) of tiered pricing, shaming as a mechanism to reduce water usage, etc. It's asinine that we have such an unclear, complicated systems. No wonder even motivated individuals have such a hard time decreasing water usage.