We need inverted tariffs now so that a basic allowance, typically 50% or so of average domestic consumption is allocated to each household at a low price.  As households approach 100%, 150% etc of average consumption progressively higher unit charges are incurred on the incremental consumption.  Those using (say) 200% of average consumption might well end up paying 2 or 3 times what they pay now.

Such a pricing policy would heavily discourage copious consumption while allowing a basic level of consumption for heat, light and cooking at low cost thus protecting more vulnerable households.  Current pricing mechaninisms achieve exactly the opposite - penalise low users in form of disproportionate standing charges while even providing discounts for the heaviest users.  One would suggest that 'quick profits' rather than prudent long term management of increasingly scarce energy supplies still dominates thinking.

This is a good idea.  For my water bill, the "service charge" usually exceeds the charge for water/sewer.  For my gas and electric bills, the "service charge" is usually about 1/2 of that for the energy I use.