What you have to do is make it worthwhile for people. Steve Keen's idea of a dual price is imo a great idea. How it works is everything has both a dollar price and a carbon price. Everyone in society gets the same amount of carbon credits. You can sell these credits for dollars and vice versa. Those who use a LOT of carbon have to buy them from those that have the credits. What this does is create a wealth distribution down while at the same time capping carbon usage. Those who use very little carbon benefit because they can buy things they previously couldn't, while those that use a lot are punished. Since the vast majority of people are at the lower end of carbon usage, I believe this would be a very popular program.