Putting some mages in authority is the smartest thing ou can do. Mundanes are both blind and deaf to magic. they dont understand it , they dont understand the problems and they cannot solve the problem. thats why the templar order got corrupted and mundanes die by the score the to demonic invasion.
What a silly thing to say.
First of all, magic can be studied and understood by those bereft of it. See, Dagna. Or hell, us!
Second, do you think politicians have a deep understanding of medicine? And yet, there is not a number of seats in parliament that are reserved for doctors only. Or meteorologists, in case there is a tsunami. Or geophysicists, for earthquakes.
Why? Because these people can be called on by the government to assist and advise in case of a crisis related to their line of work. We don't need to give them positions of authority over the citizens to accomplish this.
Much like the Circle could be called upon.