To be fair, you always had to, through taxation. It's maybe better to have the cost explicitly presented, as the only proxy means in a capitalist society of giving people some notion of the value of the good they are consuming.

But you have to ensure that you protect the less wealthy against the possibility of not being able to afford the financial charge, while also realising that the very wealthy don't give a shit, and will carry on filling their swimming pools even if you charge them a 1000 bucks/cubic metre.

At which point you begin to wonder: was it worth it?