Well that's my point. Cameron has nothing to gain, now, by following up on his vague promises to Scotland, and nothing to lose if he doesn't. Whereas he has far more to lose if he angers his English MPs and voters.
I don't trust him to do anything that isn't going to benefit him or his party either, he's not just a politician, he's a tory politician afterall.
But, he could gain some trust with some voters, which is always useful for a politician, particularly when you have a track record of breaking promises and one of your key policies for the next election is on a future referendum.
But more importantly he's made the
same kind of promises across England and the rest of the UK now too, and even put a timeframe on it. I can't see he would have done that if he didn't intend to at least make an effort, else he may as well had put a landmine under his feet.
There's quite a few ways I can think of that may help him by following through, on the English matters particularly,
- Welsh and Scots not voting on English matters will hurt Labour,
- Trust gained from following through,
- If he does a half decent job for being the 'leader' of a massive cross party project,
- It'll distract from most other issues (other than the economy, which labour aren't exactly credible on right now) if he can keep it the hot topic,
- It will likely appeal to UKIP voters as well as wavering tory voters and members,
- Will solve, or at least provide a path to solving a long running cause of English 'victimhood'
At the very least if he does a half decent job and loses the election anyway, being a pioneering politician to major British reform that hasn't erupted from a scandal would be a decent enough legacy for him as PM, else he'd only be remembered for messing up the NHS while increasing the need for foodbanks.