What's the mechanism there? How do they benefit? Exploitation is rather impossible these days, rich countries cannot anymore just waltz into any country they want and dictate the terms. If they are doing business with some poor country that usually leads to progress, not exploitation. It might very well be that rich countries want to use poor countries for cheap labor and - by keeping them poor - preserve that source of cheap labor. But it might also very well be that those two wishes are one too many. Maybe you can have only one at a time.