Not what I'm suggesting - at all. The "details" of how such an appointment would operate are so hypothetical that it does not merit setting-out such a plan, only (for me at least) the contemplation of a situation where you have a theoretical chief of defence who cannot be bullied by government.
Having said this, in my "model" the CoS would be answerable to cabinet who would have to agree to his suggestions and recommendations, much as they do in managing decisions at present. The difference in the model I am suggesting is that you are removing important layers of bureaucracy as well as replacing the political head with a serviceman.
Can anyone see what I'm getting at?