On a general note if we had a degree of federalism in the UK we might see a fairer playing field with regards this subject but with our rabble, not a chance. Generally speaking there is no interest in Manchester OR the airport from either side until election time and then come fawning around a gullible NWest public.. within 24 hours, gone again for another 4 years !
In my view a degree of "Mancunianism" would help Manchester Airport no end !
It is an interesting debate and if I remember correctly the previous administration had some plans to create and devolve some decision making powers to a combination of elected mayors and/or regional assembles in order to promote things such regional development tourism and international visibility - However when put to the electorate these points were missed and opportunity declined.
Its rather clear that England rather likes Political Centralism me thinks.