Of course I don't think many people would openly agree with it.
I have travelled far and wide as have many on here I am sure and as a western man you are viewed in many of these places as being wealthy. It doesn't matter whether you actually are or not, but people from poor countries just assume that if you live in England or America you earn a good wealthy living. Also the wetsrern countries offer a greater amount of freedom, than their own, especially if they are married to a citizen of the country. For many of these women it is a way out, and through my travels I can see that for most this is a good thing, and they are prepared to take that risk. They are not just doing for their families, they are doing it for themselves and without knowing their particular circumstances I don't think we should label them all the same.
For the men who do this, sad as they might be, I am sure I don't need to explain the reasons or appeal. It seems obvious.