My understanding is that Managers are basically official helpers assigned specific wikis. If you don't want them to do anything, they probably won't; aside from perhaps correcting any policy violations. It is also my understanding that they are not "requested by Fandom Staff" but actually are staff. As Harrypotterexpert101 said, assignments are managed by Wikia so if you really have an issue with it, you should contact staff directly. In some other thread, a user claimed that all wikis will eventually get one. That seems to me to be a baseless claim as it seems impractical and I have yet to see any such official statement.
According to the help page, they are part-time staff. So I guess that means to do get paid but aren't quite at the same employment level as regular staff like Kirkburn. I believe this page lists all of the global groups that are comprised primarily of volunteers.
Sorry to hijack, but quick related question. How does the hierarchy work? Like say not ToS are broken, but x bureaucrat wants to do something one way and x wiki manager wants to do something the opposite way - who gets ultimate say? Because if it's the manager, it does feel like they're taking over. Like a bureaucrat-plus.
My understanding is that, barring any policy/legal issues, the local bureaucrats/admin have final say. That is generally how things have worked in the past and there has been no indication that the Wiki Manager user group is intended to change it. My understanding is that Wiki Managers are supposed to be an official version of volunteers. What I mean by this is, what some wikis would previously ask for help with on here, the dev wiki, the portability wiki, etc., they can now take directly to a specific staff member. The major benefit being that you have someone who is consistently involved in helping your wiki rather than just throwing the problem out there and waiting to see who, if anyone, decides to help you.
Well, as has been said in multiple places, The Wiki Managers do not outrank local admins. They aren't in charge, just helping out. Obviously, exceptions to this would include if the admin's choices violate ToU, in which case the Wiki Manager would let Staffs know.
We don't even know if the original complaint (relayed to us by Labrain13) was based on an actual incident or just another case of a user reacting to the idea. It certainly wouldn't be the first time a user formed opinions before actually trying things out. I am not blaming the anon since most of us have done it ourselves (probably). I am just saying there might not be any specifics to report.