The Civil Aviation Authority, of course, is a quasi-autonomous non-governmental organisation sponsored by the Department for Transport, and is accountable to Parliament through the Secretary of State for Transport. It is financed from the charges it makes to airlines and airports etc. Under the Tories' manifesto plans for 'The Big Society' it would presumably be one of the bodies that 'the public' could to run for itself. Or perhaps its staff could organise themselves into a co-operative and take it over. I am not sure how this would work exactly, and why this would be better than the current situation. No doubt David Cameron and his spotty herberts have got it all figured out. But I can't really see many punters wanting to rush forward and be responsible for air traffic and determining whether or not it is safe to fly.
Likewise, the Ministry of Defence could be run by a self-selected co-operative group, I suppose. Actually, I wouldn't mind leading such an initiative. As Todd Rundgren said in his song Heavy Metal Kids - " I know I could make this world so peaceful and calm if I could only get my hands on a hydrogen bomb."