Personal networks are a huge factor. My network? Pretty much tapped out of hiring leads soon after university. I got 2 applicants to apply over the last 15 years, and there was a decent hiring bonus. What sort of networks might these Indian managers and their subordinates have? Lots of eager, qualified applicants, especially from people still with family, friends or cultural connections in India. And these applicants have a sympathetic ear, who will not toss their application in the bin, who will in general be more familiar with visa and immigration rules regarding these applicants. And the manager gets first dibs in a tough yet still discriminatory market.