Part of your question has to do with what's called elasticity. You don't have very much choice in how much energy you use to heat your home; it depends on how cold it is. You don't have that much choice if you have to commute to work and there isn't a public transit system. This is what I'm concerned about, in terms of Canada and Canadians being exposed to higher energy prices.
These kinds of uses do not respond well to price signals, which is why you need a two-approach system. Price will drive those kinds of uses when they can avoid it: when there are efficiencies to be made within industrial plants or where the user actually has some control. It will not affect behaviour and use where you don't, which is why you need the complementary regulations. If we don't actually set some targets and deploy the measures that are appropriate for each of those uses, we will not reach them.