This. I don't think they are seeing as taking advantage of something. I am pretty sure they are seen as tourists.
1. The same people who are highly concerned about economic inequality and "social justice" within western countries today.
2. Locals of developing countries who do no benefit from the foreign spending or are even hurt by it (e.g., middle or upper class locals who lose their relatively privaleged status to foreigners).
3. Local men who see foreigners as "stealing" their women.