We have a family member (lovely married couple) who are long time Bethelites who have been there since they were in their 20's. He is now turned 50 and she's in her late 40's They've managed to be able to travel a lot over the years but I wouldn't exactly refer to them as "parasites".
Their Jobs are physically demanding and they are very dedicated. He sometimes uses his vacation time (and she shares her vacation time with him) so he can do home repair jobs on the outside to earn extra money. I think it's mostly JW's who hire him. I'm not sure how that works out in terms of their "vow of poverty" but I think it is viewed as OK since it's their own time and they are free to use it as they see fit.
The trouble is they are getting older and have no Social Security and the new system seems to be delaying. I know that because of this concern, they are thinking of leaving so they can work part time on the outside and part time at Bethel as "commuters". They are so sincere and I feel badly for them but they seem to be confident that Jehovah will provide. They escaped the "lay-offs" a while back but we figured if they were to be laid off, as long as they stayed in the JW network they would be ok because Bethelites seem to be taken care of. JW's typically view Bethelites as hard working rather than as parasites and it makes them feel good to help them out financally since they believe Bethelites are making personal sacrifices to do work that they themselves aren't in a position to do.