It would probably work out cheaper. It is, after all, a bribe to get you to change; which is what they want. Which ultimately is control.
You get into a position where you feel you should avoid using water, even if hygiene suggests you ought. So the companies can eventually supply less, yet raise the charge to ensure they get the same (or as much as they want) profit.
In the meanwhile the morally superior method of a community covering the cost of water that everyone in the community needs, both for their and for their neighbours' sake, is charged at a higher rate than metered, to achieve this manipulation.
Short term benefit for you, in exchange for a longer term less beneficial position for both you and your progeny. Trouble is even if you make a stand the rest will grab the cakes and circuses and you'll be left in the same boat anyway.