The problem in CS manning is what happens when you scrap the HR system, allow people to apply for promotion once they've been in grade for 2 years and have no interest in offering career management for them.
To save money MOD HR no longer exists in any meaningful way. The MOD CS is expected to try and work out a career path with no guidance, no manning desk, no advice and so on. What did they think would happen?
I've got a fiver on the old HR system being reintroduced within 5 years as they realise the utter clusterfook that the MOD CS manpower plot has become.