Centralised Messing. After all PAYD is virtually a cafe now anyway.
Approve self-help T&S. ie lastminuteroom dot com instead of HRG or whatever they call themselves this week. Better still, use a flat rate for T&S and if you want a five star hotel or the ability to take the wife/girlfriend, you pay the difference. HRG charge the military £10 for every telephone call they make and are usually more expensive than last minute rooms. Put the onus for value for money on the individual rather then a monopoly that lines the pockets of former senior officers.
Do something with Defence Housing, because it is a royal mess at the moment and is unlikely to be competitive in comparision to an independant tender.
However we can prophesise all we want to when in reality, pulling the plug on Afghanistan alone will save multi millions of GBP. The care and welfare for the hundreds traumatised by conflict will be a hidden financial burden that will be evident for decades.
Why does nobody ever hear about the Police, Fire and Ambulance T&S taking a kicking. They always did leave the MoD in the shade when it comes to allowances.