Set the top marginal prices high and use all that money the rich people with mansions are paying to build up a bunch of infrastructure to go get more water. To

Set the top marginal prices high and use all that money the rich people with mansions are paying to build up a bunch of infrastructure to go get more water. Today's major consumers, on the other hand, don't present a way to capture the revenue like that, while still using the water in ways that are still nonproductive from a "why do we have to do this here" standpoint.