[graeme]

Is a tax a regulation in that sense? I’m wary of non-tax responses to climate change for the reasons you suggest, I think they’re easy to game.

But with a tax you can only evade. The income tax still raises revenue and discourages income, even though it can be evaded and often is. I think a carbon tax would similarly raise revenue and discourage carbon, while letting us cut worse taxes like the carbon tax.