As to you resort to Quinn, does it trouble you in the least that his two "Power" books were not peer-reviewed as an academic work would ordinarily be? I can assure you that I have indeed read those works and followed some of his cites. The ones I have followed, without exception (of course, I was following the ones that caused my eyebrows to go sky-high) were abysmal overstatements.
I do seem to remember a couple of FARMS Review of Books reviews of Quinn's work from some years ago that made precisely that observation.
Quinn is quite good at taking something normative or even rather trivial and expanding it into a something deeply important, troubling, or even sinister, with regard to the Church and its leaders.