Progressive water pricing

I believe that while ecosystem service models are not a cure-all, a better appreciation of the wealth of benefits we receive from ecosystems is necessary (at the very least, since the intrinsic value of nature is hard to comprehend). To this end, with specific reference to water, I envision a progressive pricing system for all water consumption. This would provide all income groups with cheap access to amounts of water that they require to meet their basic needs, while exacting very high charges on corporations that consume vast quantities of water, which they often discharge untreated. In between these ends of the water consumption spectrum, wealthy individuals may be dissuaded from constructing water features and other monuments to vanity that waste potable water. Increased government revenue from these charges could be spent on repairing infrastructure, and investing in promising water purification technologies. Better valuation of water could also open up corporations or even governments to liability for pollution, since class action lawsuits would have a clear legal basis for a c