This is a far fetched comment and there are some logcial holes, but the thought crossed my mind. But, then again, we are dealing with a cult and a cult isn't logical. Why does the WTS need a written $$ amount from each congregation, and what happens if the congregation can't produce the money?
If one pledges to a charity, can the charity sue the donor if the pledge does not ultimately come in? The law is evolving, and the answer is a limited 'yes'. Especially, if the charity has relied on the pledge, the charity can try to enforce the pledge in court. This is what is bothering me too, the Society is making it well known that this is to build Kingdom Halls all over the world. Courts that recognize this doctrine, pinpoint construction projects as a standard for 'reliance' in this legal area. It's going to be easy for the Society's lawyers to point in court to the "reliance" the Society had on the promised pledge.
http://www.law.tulane.edu/uploadedFiles/Institutes_and_Centers/Eason_Weinmann/v02i01-Lemann-final.pdf
What type of court ordered reward could the charity get? Depends on what the donor had. Congregation's bank accounts, congregation real estate . . . and if it was an individiaul who gave his name . . . then his bank accounts, his real estate (homesteaded property not protected in vast majortiy of states from this type of lawsuit), and a percentage of his future earnings. If a person doesn't live up to his bargain, then the Society can try to disfellowship him for lying and not following the truth. Now, the publisher has to give money or face losing his family & friends. A congregation that consistently doesn't give enough, may be forced to close or regroup . .. . and their assets (probably owned free & clear at one point) sold for the WTS benefit.
The holes would be that the Borg would be, in essance, gobbling up the congregations. The Borg would have to sue (or threaten) to sue the local body of elders or individual JWs in court. That would not make good publicity.
In reality, this is just a money grab that I just don't understand since the WTS made billions on selling properties lately.