We have recently been in Asia on vacation, travelling to a number of countries in this part of the world. Whilst in Thailand, my wife, totally PIMO, wanted to go to the English speaking convention in Bangkok. Although I haven't been active for a very long time, I went along with her.
The first thing that slightly surprised me was the attendance, well over 900. I hadn't expected that many but they were from all over the country, which is a pretty big place. The majority of people 'serving here, where the need is greater' are white (though a few Afro-Americans), from all over the world; many from the USA, Australia, Canada, New Zealand, and Europe. Now these are not allowed to witness to Thai nationals, so the only people they can target are foreign workers from Myanmar, Indonesia, etc., and many other expats living or vacationing here in Thailand.
With 900 plus witness in the 'need greater field', many of them pioneers, there were just 2 baptized.
It strikes me that many, if not most, of these here are really in it for themselves. The preaching work in developed countries is just about dead, moving to less developed countries here in Asia or South America is attractive to many wanting the kudos that comes with 'serving where the need if greater'. Also, many of them home school their kids, and so lead a slightly strange, isolated life.
There was an interview with a couple who had been asked to leave (kicked out) of Bethel in the USA. I think they had been there 25 years or so. The guy said, "here I was, 40 plus years old with no college degree or marketable skills". (May not be 100% right on ages.) So, we decided to move to Thailand. Not the greatest of decisions I would suspect in a few years time should they need continuous medical care, no money, no pension. But these people are held up to the audience as role models to follow.
I have no objection to people moving to live in exotic countries, but I suspect there is a degree of dishonesty as to the real reason why many are here.