Via Jonathan Foreman (Follow him at @JonEForeman), an Anglo-American journalist who writes often about India, a little insight into how H1-B visas work in practice. The Wall Street Journal reports:
Indian companies such as Infosys Ltd., Tata Consultancy Services Ltd. and Wipro Ltd. have set up large U.S. offices to be closer to clients, staffing the sites overwhelmingly with Indian expatriates, who earn significantly less than their American counterparts. … Indian outsourcing giants sponsor more than half the 65,000 skilled-worker permits, known as H1-B visas, that the U.S. issues annually to workers with at least a bachelor's degree. … Many of these firms have as much as 80% of their staff in the U.S. on H1-B and other visas.
The Senate's immigration bill proposes gradually to curtail these practices over the years ahead.