I've just finished a book called Last Trains by Charles Lofts (not recommended, it was a dense read) about the railway industry leading upto the Beeching / Marples era and to a lesser extent on the aftermath.
The main thrust of the book is that up until it was realised what damage wholesale railway closures had done to communities the nationalised railway had to 'balance the books'. Some routes would never, ever be able to break even, or make a profit, but were closed anyway. The author quotes a few examples, the one that stood out for me was the line to Wells-Next-The-Sea which carried huge numbers of pilgrims to Walsingham.
Since then it's been recognised that railways wiil always need to be run with a government subsidy of some sort if we want a national rail network. The argument has become about how big that subsidy should be.
Back to power.
I know next to nothing about the industry, but it seems to me that if we want to provide grid electricity to every corner of the country then it needs to be a public service, and subsidised as such by the tax payer.
Of course, it's a socialist idea, that the city dweller subsidises the country family that provides the food on the table.
I struggle to find the excuse for the profit motive but I'm an unreformed dinosaur (and not signed up to POBI).