Americans used to say that service jobs were safe from the impact of globalization because there was no way for companies to ship them overseas.
But employers can achieve the same goal by employing unauthorized immigrants, who, like the workers in Asian sweatshops, are outside the protection of American labor law.
A recent example of this was contracting the delivery of the Boston Globe to a company that employed unauthorized immigrants. The public was upset by the huge number of delivery problems. It should also have been upset by the loss of jobs of American workers who formerly provided reliable service.
The problem is not the unauthorized immigrants, who are hardworking people who are trying to get by the best they can. The problem is those American employers who are trying to drive down American wages by any means necessary.