I've got an idea. It may not be the best form of the idea, but it's a start.
I say there should be a user right specifically to edit MediaWiki pages. It could be enabled and disabled on any wiki in Wiki Features in case the admins might abuse it. It would be like Bannedfromchat, but would have a time limit, causing it to expire.
This may be useful for an admin on one wiki to put something into a MediaWiki page on another wiki that they don't have admin rights on—with another admin's approval, of course.
So, what do you think? Please provide a more specific opinion in the comments in addition to voting on the poll.
(I know, I overdid the joke in the last option. :P)
I would also like staff to consider this as well.