My home is identical to 13 others in my Close.
Nex door to me lives a retired married couple.
Their washing machine is on at least once a day, they do not try to save on their water use because their bill is half of what I pay.
I use my washing machine 3 times a week, don't flush the loo when there is no-one else here.Never water my garden or wash my car, never have a bath, just a quick shower.
The people next door must use at least twice what I use and yet their bill is half mine.
If I had a choice, I would never have a water meter.