Several people who are into software companies join in Indian Multi Nationals who usually have their base in California, and flee to the US to attend to some onsite project implementation or something for quite some time. When these people go as guests to the client’s places, they are given all sorts of previlleges, like a car, a decent place to stay, top calss food, and pretty good spending money. So in the weekends, they look around the city, go travelling around, look around the whole of the US at the company’s expense, and look for some consultancy who would have a good list of San Francisco jobs in their portfolio and pass on the resumes to them, and when their project at their site is complete, they just resign the job, and with the experience in hand, just join a job right there and dont come back to India.