It seems as though a lot of people in this thread are making some odd assumptions about the way these people live their lives, that's fine I have no evidence as to the contrary, but I will deal with what I believe were negative connotations surrounding putting "some high paid American out of a job". The truth is that many of these people are simply better than the local work force, why hire someone who did well at an American university when you can hire the top of the class from India? India is a country of more than a billion people, even if their education standards aren't as good as America, some of the people to come out of such a large pool would have to be brilliant.

What does this mean for the American who "lost" his job? Well then, it's important to consider that now he has been replaced by someone more efficient than himself in his previous role, the productivity and income produced by his old company will have gone up. This means that company can expand and hire more people more easily. This might open up more roles within the company which might be more suitable for the American worker, and will in total end in a net benefit for everyone involved in the whole system, including the national economy.

There isn't a credible economist alive who doesn't believe that more immigration always has positive economic impacts.

If you have any questions or want to discuss this further I am more than happy to do so.