What is important, cost or reliability of supply?

From World Economic Forum

Like the island of Mauritius, UK has an electricity supply system with reliability of well over 99.9%. This is unheard of in most of the less developed world.
Despite our lax and irresponsible use of electricity, we continue to throw money at the problem of peak demand.
In countries where this is not an option, the lights go out on a regular basis, and people suffer. Vaccines and other medicines are damaged through lack of refrigeration, children can't study, vital communication systems are disrupted.
Will we wait until we are in the same boat before we do enough  in UK to flatten our demand?
Its up to all of us to raise awareness.