Your evil case is not evil
The point of pricing water to that level is that it would induce other people who have access to bottled water to bring it to that market, as is desirable
You assume that other people can simply bring bottled water to market & compete with discoverability and access to customers with established players?
Or is your point that all people in a market with leaded water should be paying $100 for pure water because it is inherently worth that much per the market.
> The point of pricing water to that level is...
No, the point is to selfishly profit-maximise. I'm not trying to be difficult in saying that. The thing you describe is not the intent, it's the hypothetical effect. It may or may not do that (I don't think it typically does, take toilet paper during COVID for example).