This is the nub of the whole problem that is terrorising the less well off. If in times of food price escalation, there was a fix on a staple item, e.g. milk*. The government decided to state that the milk's price cap was £100* per head p.a.. There would be howls of protest from those who use less than the average and couldn't afford that much and need urgent support. Energy is no different except that for some obscure reason, the government chooses to obscure the cost per kWh and quote a meaningless average for all. This causes many who have smart meters to boast that they never look at theirs. Why not? - at least the figures that they show are personalised and are actually relevant to the household's bills.The problem though is that energy pricing generally is complex and not well explained or understood. We have the confusion around the 'cap', confusion around estimated vs actual bills, confusion around how monthly direct debits are supposed to work and actually work. Not to mention confusion about how to work out the cost of running a device/appliance leading to people taking steps to reduce consumption that actually lead to bigger bills...
* milk is just a random item of almost universal household consumption (be it full fat/skimmed/soya/oat/etc.), and the price was just a figure for the purposes of discussion.