I think that’s pretty much what the actors that aren’t the uppermost leadership have been told & in addition to appealing to people’s better nature, they’ve probably been incentivised with huge amounts of money. They’ve also been told if any of them divulge any of this, they’re out & no money. Further, hints of severe punishment.
I think that just about makes it work.
Remember also that just as Mattias Desmet says, around 30% of people truly are victims of a mass psychosis & genuinely believe the nonsense.