Does that company hire or recruiter hire h1b? In order to get h1b approval, you have to make the case that "we interviewed x,000 people andwe just can't find any qualified applicants! ". I'm starting to suspect that the industry has learned to set salaries low and churn enough applicants in order to reduce costs. One way to churn them is to do a phone screen and find a quick way to legally get rid of them. Then once you get the type of applicant you want - that happens to work for 20% less and never complains because his foreign residency is tied to his employer - simply don't ask them the question.