It's a core Marxist observation, based in history. Every system that has ever fallen has fallen because of the organized action of a class or a set of classes, not necessarily in a party, since the very notion of a party is extremely recent, but organization in some form. It's a process that is always violent, usually doesn't happen all at once and may not be definitive, but that's how things have happened so far. There's no evidence that it will happen the way you think it will, but honestly, good luck with that. It would be great if we could move to a fairer system without all the burden of having to organize and having to respond to reactionary violence in the same level.

I do take special exception with your notion that these egregors come into being out of conscious and renewed informed consent.

I don't know exactly what in my answer led you to the conclusion that I think so, but that's not the case. In my opinion, these "egregors", which I call ideologies, arise according to the need that material conditions require. As material conditions change, mainly because of the sophistication of the means of production, new ideologies emerge from the new socioeconomic conditions produced by this change.