I'm not really sure what we disagree about Ruby
My original response was related to the question of income and areas. In the main, with some exceptions, I would suggest that in most urban areas (which is essentially what most of England is) location is a result of income not the other way around. There are areas like the Highlands, rural areas of Wales and pockets in England that location may drive earning potential however IMHO this does not hold true for much of the country.
I think here in the UK geography means that in the main (especially in England), low and high income communities are often close to each other. This is mirrored in urban areas of even geographically large countries like Australia.
JWs are often in lower income brackets.
JWs often have less income going towards long term investments, pensions etc. This means more disposable income however this is offset in more recent times by the high cost of housing.
Whilst I see well off Witnesses with well paid, professional jobs and those with low levels of debt (regardless of income level/job type) there is no doubt in my mind that for the majority of younger Witnesses who are working in lower earning jobs they will have much higher levels of debt than their parents would have had at a similar point in their lives.
I don't know about teens leaving and coming back other to say that I don't think that there are many teens who leave, get an education, enter a well paid job and decide to come back in when they have a family. I don't think the recent scenarios played out in the WT publications and videos about those that rebel, leave, make sme bad choices and come back after some pain are fair from the truth about the majority of those teens that do come back.
I think Shepherdess' OP data would mirror the UK.