Tiered prices would do it better.
A low rate for a small amount of usage for a poor and/or super frugal home, a normal rate for a wide range in the middle of normal usage, a higher rate for high usage, and an exorbitant rate for the mansions that have the usage of apartment complexes, that would be the way for conservation purposes.
It wouldn’t be the best way for large, even huge immigrant households that are great at hiding income.
I’m noticing that many poverty programs are not geared toward non-immigrant Americans and the elderly but are focused on the lifestyles and households of foreigners.
California already has tiered usage rates.