I knew a C.O. who actually retired. He literally pocketed as much as he could of the green handshakes and he and his wife were able to make it on social security and all that money they saved. It wasn't even a secret that he lived so tight on just what C.O. expenses the congregations paid for and ate at the kindness of the congregation circuit members.
I also remember Bethelites who had been forced out of Bethel and returning to the job market. I would sit and talk with them and they would avoid talking "spiritual" and avoid many Watchtower discussions. If not for their former service, they would have been considered "weak."
Members will again and again be reminded that any sacrifice they made in "this system" will be remembered by Jehovah.
It won't work to keep former organization Bethelites, C.O.'s, missionaries from rumbling. But it will minimize their doing anything about it. They will want to keep the crumbs of the members' generosity and many of them will keep their dissatisfaction to themselves for the most part.