When I lived in Malaysia I learned that the residential electricity rates were very low for the low levels of use and climbed fairly rapidly as you used a lot of electricity (say running your air conditioner a lot). I think this is a very good idea (especially for the not yet rich countries).
Effectively the rich end up subsidizing the low rates for the poor, which is a very sensible setup it seems to me. The market functions fairly well even though it is distorted a bit to let the poor (or anyone that uses very little electricity) to pay low rates.
In a country like Malaysia as people become rich they may well decide to use a great deal of electricity for air conditioning.