Many years ago, I read a book on how the Catholic Church became so wealthy. (sorry, no clue of the name anymore)
The author documented how the church came into a lot of money when Mussalini bought church property. A well known Italian investor took over the financial reins and built a financial empire of Banks, industry, etc...
With the WTS, you see some influence like that. JW's on the outside volunteering to help with raising money in investments with the WTS being the beneficiary.
One JW I worked for was very wealthy. He and his family became a legal support team for the WTS. At their own expense, they traveled the country with the sole purpose of legally closing 'willed property' and estates to the WTS. They were given pioneer status for their efforts.
His assistant, not revealing the amount, told me the estate money granted to the WTS was staggering.