If I may break the train (which seems to be either throwing brickbats at Farkel, or else throwing brickbats back at those who do!) and return to the title of this thread:
- cleaning used to be seen as the single best source of part time work, and possibly still is.
Only because of this, many in the pioneer service turned to cleaning work in order to support themselves. It certainly did not mean that the same individuals were incapable of anything else (although I certainly agree that it does not prepare a person for much else - certainly not for handling the responsibilities of an elder!)
It should therefore hardly be a surprize that a disproportionate number of JWs are cleaners by occupation.
And not only window cleaners, either. Around here, many are into carpet cleaning as well - some even owning franchises for one or other of the big carpet cleaning concerns.
As well as cleaning, though, the local JWs seem to also be heavily represented in pest control work - and at all levels up to senior management.
Bill.