[Raistlin]

Ok, so how would we choose such a Minister?

If he or she were a follower of any particular faith there would be accusations of bias, if they were a person without faith then there would be accusations that they weren't in tune with the faiths that they represented.

Any person in such a role would be nothing more that a token representative, still finding themselves having to give more weight to the political doctrine of the Government than to the sacred doctrine of their religion.