Look, it's quite simple: if your solution is to get people to use less power, you're fucked. People won't use less power unless they're entirely unable to do so. You need to work off that fact instead of trying to handwave it away.
That's why the GP said no more power plants allowed (not sure why he objects nuclear though). Prices go up, man becomes entirely unable.
Hopefully the fossils who want to burn fossils start to die off soon. It's time for new kind of thinking and the old folks just are not agile enough. Makes sense, they don't need to stick around for the consequences.
I live in a house that has 24 apartments. There are 5 garages at the ground floor, and parking places for 6 cars in front of the house. Can't see in the garages, but the outside parking is empty on a typical evening. Conclusion: people will stop using cars when they're unnecessary.