Thanks @Atlantis and take again some cold german beers
The big churches protect their "monks, priests and nuns" - by allowing them to stay in the monastery all their lives. So, of course, the churches also have an overview of what the costs are. (evil world of Satan)
The JWs throw very most of their "old ones" rudely out of the Bethel and give them the status "special pioneer". From now on, it becomes difficult to keep track of the costs incurred. (spiritual paradise of Jehovah)
My guess: A low mean will be formed from the total monthly costs reported back and that will be the future maximum allowance for special pioneers. These will then have to see to it that they live and reside very cheaply.