The hard questions are
1. are we willing to give up high end capability and make do with less expensive kit?
2. are we willing to say there are some places we will not go (eg E of Suez)?
3. are we willing to give up the deterrent??
Any one of these would make a major impact on our ability to achieve a workable armed forces capability - the problem is that by hanging on to all three we are failing at all of them.
OR we can say yes we want to do it all - now here is the bill and here is what will be cut elsewhere/tax rises to pay for it