The paralysis has little to do with Brexit and everything to do with a £20Bn black hole, a weak government that cannot tolerate bad news and an economy/public that will not support increased defence spending.
Actually, I wouldn’t support increased spending either. Give Defence another £10Bn a year and within a decade we would be back in the same situation. Bernard Gray (for all his other faults) nailed it with his 2009 report and Levine followed up with a sensible plan (stand fast his lack of delegation of infrastructure). The problem has been that Main Building have not implemented Levine properly and have been unable to stop both meddling in TLB business, nor been able to hold Chiefs’ feet to the fire when they overspend.
Give the Services their slice of the pie every 5 years, then not a penny more (or less) until the next review. Then let them get on with managing their budget - and the consequences.