Here is a new one for you, how about a rule that says that any family who earn over a certain amount, say joint income of £50k can not live in Social Housing, they should rent privately or buy, I know of a number of people on very good money living in a Council House, and such a rule would free up a lot of houses............

I see your point, Mike, but I think the point I was making has more validity. If, as the government says, the point of the 'bedroom tax' is to free up housing, not save money, then I think it would be fair to ask everyone in under-used property to take part.
I think asking people who utilise every room to move would be counter-productive, if the governments criteria was applied.
I live in social housing and my wife earns more than 50K, but it certainly wasn't the case when we moved in and moving to a similar sized, private dwelling wouldn't free up anything, although it would probably make some people feel better.