It is amazing how ignorant some people can be and as much as I'll probably regret it, I'll bite, I've got a couple of minutes free.
So you intend to disband the military - that rings a bell, can't quite place it, but I have a vague recollection it didn't end well for the country in question, and replace us all with mercenaries of questionable loyalty and values.
You mean mercenaries like these?
Blackwater guards found guilty in Baghdad mass shootings - CBS News
As for unelected top brass, given that the most senior appointments are ratified by the government rather than just made by the services, and that you as a voter elect the government to act in your behalf .....
Or are you just a rabid socialist who detests the idea of organisational hierarchies? Or did you just fail OASC?