Your are utterly right!  Just looked-up "Perennialism" and it adds a further dimension to your point.
I was focusing on the need, the obligation for institution to be represent and remain appropriate to, supportive of and subservient to (i.e., incarnate within) the community it emerges from. Institutional form must incorporate a methodology that tests, retests its foundation in its mission. There is an eventualism of institutional dominion or institutionalism that must be resisted.
Your point of Perennialism presumes that the non-accountable, esoteric origin of the organization precludes accountability but is in fact quite the opposite. Elitist, it demands submission, obedience and obiesence as a condition of participation. Sadly this seems to typify our Church and blatently contradict the notion of the "Mystical Body" and the "community of the companion followers of Christ".  Another construct definition in self-contradiction typical of clericalism.