I think that policy lurch is a real problem under our current system. It's the same in any winner-take-all system that incentivizes, as ours does, politicization of issues that do not necessarily have to be politicized such as climate change, to take your example. You can slice and dice the electorate on issues and wedge your way into a 39%, 37%, or even a majority government, and you can pull the plug when you want to.
Policy lurch is a real problem. There have been a number of examples in Canadian history on this. First we're in the Kyoto accord, and then we're ripping it up. There are lots of different things like that.