I think it's quite easy to imagine my possible scenario without the GB feeling they are being dishonest turning it into just a religion and still allowing the R+F to finance their lifestyle. After all the party line they are feeding them now is well whenever the paradise comes it is still the best, most moral, most happifying way of life.
Even if they think they've got the prophecies and the timing all wrong and they're not the spokesman of God they could still believe they deserve a comfortable lifestyle for giving people the best religion on earth. As for the rest, they might think, whenever Armageddon will come, we'll leave that to Jeho....whatever his name should be.