If Britain doubled defence spending, unemployment would fall, the defence industry would invest and grow raising tax revenues and expanding sales. We could afford to fix rogue states, bring them into the world economy and grow their trade.
If the rest of the world won’t provide leadership, then the english speaking world should do so. Experience in threatres like Afghanistan is growing, and our military capabilies to defeat insurgencies are building.
The Blair doctrine of intervening was been held back by the Brown doctrine of refusing to invest money in security. Brown could stick his international aid where he likes. What these countries need is peace and an end to corrupt and brutal regimes, that fear no international retribution for their crimes.