I'm not buying into the conspiracy stuff.
I think the simplest explanation is the best explanation.
It is simply easier for Chaves to keep extending the same coaches than facing the prospect of having to search for a replacement.
It is also cheaper to keep extending a coach with a slightly above average winning percentage than hiring a younger coach with bigger upside and higher earning potential.
This all goes back to my contention that UND's Division 2 era funding model is simply inadequate and incapable of providing the necessary resources to build a successful Division 1 athletic program.