This speaks a different story than I see in our area. It's difficult to hire people. Much more difficult to hire honest, dependable people. When you find that kind of employee, you pay them well or they move on to someone who will. We have younger (30's) JWs who are doing quite well. Many taking cruises and international vacations. They have nice homes and nice cars. I am quite sure they are contributing regularly and I think there is a pride among some about how much they can contribute.
I know of one single sister who was converted by studying in prison, so she has a felony on her record. She has had no trouble getting work and was recently hired by a larger industrial manufacturing firm here which is union and so she's making the best paychecks that she ever has. Even before that job, she was concerned about ONLY contributing $100/month.
Many younger JWs are in the construction trades here and earning $50,000+ and good health & retirement benefits. Quite a few are self employed in service businesses, ie cleaning (those people earn good money here as an average home pays well over $100), dog grooming, hair styling, etc. All of these young couples are living well. And likely contributing well.
Why are they still JWs? Because they don't care about doctrine. Hell, they don't even know JW doctrine. Being a JW is their social network. They are not interested in being involved in things that are objectionable to JWs, ie, screwing around, overdrinking, or drugs (if you want MJ you get a medical card). And, the men are all receiving "privileges" in the Cong and feel good about themselves for it (and they get to wear a suit and tie). They can keep the Borg in the black for another (overlapping) generation.