Scary option - seems decidedly 'purple' & Defence Force based
but...
...the major savings from personnel (other than cuts in numbers or pay cuts) can only come from homogenising the 3 Services into one and then have core military basic training being completed at 1 major location rather than the 4 (or is that 6 with RAF additionality) currently used - and then have trade training also include branch of service training.
The same could be done with Officer training.
'Royal' has had it right in having Lympstone for the last 30+ years training all ranks in one location (and Deal before that IIRC). Particularly forward looking IMO.
Don't get me wrong - it is an absolute disgrace that the economic state and the wilful incompetence and neglect of the 'political class' has brought this to a head.
Politicians should have previous experience outside of politics before thay are ever allowed to stand for election - and I don't mean working for a party, being a researcher, or some token Civil Serpent job to fluff out their CVs.