Yes it occurred to me that they may be facing a demographic squeeze. If I understand the Circuit Overseer guidebook correctly the Watchtower Society has made a commitment to Circuit Overseers who have spent a certain amount of time in the job that they will be pensioned out as "special pioneers" when they reach retirement age. If they really honour this commitment then it must be a tremendous financial burden, and increasingly so as pensioners live longer.
I think the Watchtower may really be facing something of a financial crisis, the sale of Brooklyn properties only affording a temporary reprieve.
It might explain the "bunker mentality" of the recent videos and magazines. The Governing Body may realise that with donations down, and costs up, they only have funds to last a few more years. They really believe it's God's organisation however, so they may be convinced that Jehovah will bring Armageddon before they run out of money. This might explain the more extreme end time drumbeat of late and harsh crackdown on faders. They are going for broke, literally.