I do not believe meters should be forced on people. Every house-hold should have the option, and the right to refuse. If un-metered bills are based on an average meter readings for a house-hold of certain size, then the more meters you have, the more accurate the un-metered house-holds will be.

I don't know how feasible a 'smart' meter for water usage would be, or an online portal allowing customers to see in greater detail how much water they use, and if 'smart' meters are not an option, then allowing customers to update their meter readings. A well-visualised portal will give customers the perception of having more control over their usage.