There are people like that but if they don't count any cost to themselves or anyone else they're not likely to even look at their water bills.
I'd hope that if they had to pay by the unit some might think twice about the need to have a sparkling car, about collecting roof water for the garden and somehow to restrict their flush flow.
It's not just everyone who can afford it who squanders money though ...
That's another argument for universal water metering.
Quite. They don't feel the need to wash cars, water gardens, fill paddling pools, flush lavatories - especially all done with purified drinking water.
Mary