In my mind if you elect to live in in your own house then that is your choice - why should you get Home To Duty to pay you to come in to your place of work? You chose to live in private accommodation.
Choosing to live in your own accommodation saves the MOD millions; I don't agree with your sentiments on this one.
Moving everyone to Brize from Lyneham is a housing nightmare. It's just as well they are only a short hop from each other because there is not enough SFQs as it is. People will just have to get used to the Chippenham/Calne/Wooty B commute to Oxfordshire.