Ok, BACKSTORY. I saw a post on tumblr a while ago about Mycroft secretly being the Minister for Magic and it just made total perfect sense. And he'd be such a fabulous dandy of a Minister too. And you know he'd do it just so he could wear a badge that says M.O.M. Hee.
(if anyone knows where that post is, link me so I can credit)
--> My tumblr