I think the demographics of a congregation are similar to any “worldly” organization. You have:
1. Takers - those not ashamed to take advantage of other. These are on the top, bottom and middle of the economic pile.
2. Givers - those with morals that are taken advantage of by number 1. They are easily guilted and shamed.
The difference with the JWs is if you are being taken advantage of you it is difficult to get justice. You just have to suck it up.
I did some office cleaning for a super pioneer couple many years ago when they were on a pilgrimage to bethell . I didn’t get paid until I pushed the matter with the elder husband. I got a check that I couldn’t cash because they spelled my name wrong. I asked for another check and finally got one after harassing them for a couple of weeks.
This couple are now in the circuit work.