So The Times sees nothing wrong with offering Third World people the "opportunity" to work a 60-hour week for less than grocery money. It is interesting that you mention the bracero program. Exactly what type of "abuses and corruption" in that program offended you more than those that would certainly continue to exist in the households where underclass nannies labor for professional-class families?
You say that few Americans "relish the long hours and low pay of those jobs." Gosh. And I suppose you think that immigrants do. When my children were little I could not have imagined exploiting desperate people in such a way. Shame on you! Either we compensate people for their labors or go without their services. Lincoln freed the slaves over 100 years ago.