So if municipalities tracked the cost to install and maintain the utilities accurately they could split out the infrastructure rate from the kilowatt rate. Once you pay off the cost of your portion of infrastructure then you would only pay for maintenance. This would result in more efficient pricing for watts used of electricity.
If they charged the true cost of the grid and dropped kw pricing to the true cost, people would have little incentive to conserve the limited resource that is electricity generated.
It is more like the supply/demand has set a price for KWs and the margin the electricity companies make on it is used to subsidize the cost of the network.