Here's how: Over 200,000 Indian professionals working in the US have about 20% of their salary deducted for social security retirement benefits, which go to the US treasury. Logically, this money should be given back to them when they return to India, since they won't be spending their retired life in the US. But American law stipulates that retirement benefits will be made available only after one has completed 40 quarters of work in the US.
Most Indians don't stay that long, and therefore end up contributing that money to the US treasury. IT professionals alone contribute $600 million annually, according to Nasscom. Professionals in medicine, financial services, consultancy, among others, are also heavy contributors
please read the news appeared in India Times link
http://timesofindia.indiatimes.com/articleshow/810151.cms
Most Indians don't stay that long, and therefore end up contributing that money to the US treasury. IT professionals alone contribute $600 million annually, according to Nasscom. Professionals in medicine, financial services, consultancy, among others, are also heavy contributors
please read the news appeared in India Times link
http://timesofindia.indiatimes.com/articleshow/810151.cms