Some say no. The challenge:
Name one government programme, in a democracy, for anything other than a war (on people, I mean, not ideas or natural conditions), that has ever forced the entire citizenry to do something as painful and inconvient as cut their energy usage by 20-50%. If you can do so, I will reconsider my stance. I note that Britain is in the early stages of just such a plan, and if it works, I will eat my words with a glad smile.