Reason: As a group, and especially their older children, they have come to expect and demand the competency, honesty, and efficiency of the political and cultural institutions that they enjoyed in the U.S.
Also, it is the healthy men between the ages of 15 and 50 who have the strength and daring to confront the danger of crossing the border. This leaves many of the women, children, and elderly open to exploitation. Towns and villages devoid of their most healthy, intelligent, and aggressive men have little barrier to corruption.
Yep, you make a lot of sense!