How? XYZ Corp. hires 1000 illegal immigrants. When ICE raids and arrests the factory foreman, he points to HR and says, " I just work with what they send me...so, they arrest all the HR staff...who points at corporate management and say," we hire the people they instruct us to hire...with the documents they have provided without looking very closely...per management instructions," and, of course, management skirts responsibility by claiming they have instructed everyone to verify the documents and report up the line anyone they have more than a reasonable suspicion of being illegal.