there are many countries. different quirks from each.
for over half a century or more united states has been considered a rich country with a huge middle-class population. women in many countries have been taught that men from the USA are likely wealthy compared to them. it is the same for several other western cultures, and also a few eastern ones such as japan. the perception is usually more than what is true and it causes attraction.
when one has 10+ times the resources of the average man in the area, many women of all ages will at least want to investigate that man. not just as a gold digger, but interest in the guy because of the money not just to get the money.. if that makes sense. it is part of the value presentation of the whole package. it's the same everyplace, not many women staying with a broke-ass lazy guy even if he is very handsome. he certainly will do better than an ugly broke lazy guy. take a guy earning 100 or 300k per month in the US and plenty of women that know about him will want to investigate, that's about 10x the average for some areas.
the wealthy women from other countries are not as interested and in many cases actively avoid the western foreigner. That's fine because they are just as spoiled. the difference is that they are the minority group whereas in the west they are the majority.