Titan,
The "cyclists RLJ / ride on pavements" is a complete straw-man. Firstly, it is a rather odd excuse not to look at improving the lot of the majority because of the activities of some. I cannot imagine motorway widening being put on hold because a significant number of drivers speed and some ignore the highway code. Secondly, it is an excuse for inactivity. There will never be a time when every cyclist obey the highway code and the law to the letter. This is because cyclists are human as well and there will always be some who don't follow the rules. Even if we did manage to get everyone to obey the law, then people like your MP would still find a reason for inactivity - they fundamentally don't get cycling, and don't want to promote or help cyclists, but don't want to actually say it. The good news is that people like this are starting to sound out of step with sentiment, at least of their peers.
The cause is certainly worth pursuing. In fact, I think it more than about cycling - it is about taking the next step to improve our cities for living, working and leisure. It is only when I stand back and look at places like Parliament square that I realise how far we need to go. Here is an iconic site, one that can be recognised around the world, one of the images of London. And it is flanked by narrow pavements and a multi lane racetrack which is almost completely impassable for pedestrians. Or, more locally to me, Bow Church, a lovely building which has graced Bow for 700 years, but is currently stranded in the middle of the A11 / Bow Flyover approach - a road which is more motorway than urban street. When people generally see that this is just madness and destroying communities, then we all will have collectively won.