I am about half convinced the the continued push for H1-B visas and the encouragement of illegal immigration are an attempt to import a more pleasing lower class. The offspring of the old Yanks and Rebels are too independent and not near obsequious to their economic overlords. The free descendants of slaves have been through this before and know how to bear grudges.
Besides these groups are much less colorful and mellifluous than the newly proposed underclass. And less grateful to their prospective lords and ladies.