It would also mean that the Head of the Armed Forces was an appointee rather than elected which is not really the way our democracy functions.
The way it is functioning at present is not to everyone's pleasure.
Though the CoS wouldn't be elected from a normal constituency he would be elected from among senior members of all three services. The finer details of how something like this might work are somewhat irrelevant but I am interested to hear any views on how a head of defence who has the sort of powers I have outlined might serve not only the Armed Forces but the nation.