phaster, again, you’re assuming that desalination as the only source of water. Toilet to tap was estimated to provide ~30% of our water need. So, it’s not necessary to have desalination as the only solution. Then there’s the improvement of storm water run off so that the rain we do get doesn’t go into the ocean. Then build a lot more storage so that when we have wet years, we can bank those water for the dry years. We can also not dump a big chunk of fresh water to save the damn smelt. They can go the way of the flightless dodo too.
However, even if we have to build 20 more desalination, why not? If we can spend almost $100B on the damn bullet train, I’m sure we can spend $200B on desalination plants. As I stated, I wouldn’t mind paying 5X more water, if that mean we can make the water police go the way of the dodo bird.
Your “solution” isn’t really solution at all. Your “solution” is to do nothing at all. Which is what you were railing against. Also, why do we have to restrict ourselves to solution that can provide us with cheap water instead of just providing us water?