[dmurray]

Yeah, I generally agree, everyone is in favour of things like "peace" or "health" or (more controversially in the US, but mainstream in Germany) "the environment". The questions shouldn't be about whether you want to improve the environment, but what hard/unpopular choices you are willing to make to achieve that.

So you should give the party in favour of increasing income tax and subsidizing public transport a chance to say that, because it's a hard choice, just a different hard one than increasing the carbon tax.