Who benefits from outsourcing ? Certainly, the asian countries where jobs are getting created and american (or western) companies whose margins increase because of getting done in a low cost location.

The losers though are american public who lose their jobs. 

The following piece elucidates the above points.

 Why does outsourcing take place? Because it’s in the interest of American workers? No, primarily because it’s in the interest of the companies that do outsourcing. That does not preclude the possibility of it being in the interest of all Americans – or a lot of Americans. The competitiveness of the companies doing outsourcing is strengthened. That means that they may provide more jobs at home, often jobs in innovation, administration and design – and hence better paid jobs. In that sense it turns into a problem af education and qualification, or a problem of Americans moving up the international value chain.
Very often, however, a lot of workers are made redundant. Their chances of finding alternative employment depends on levels of education, – and on the business cycle at large. If there’s an economic recession it may be difficult to find other types of employment. In rust belt areas this may not be easy, regardless of the state of the business cycle.
The most harmful effects of outsourcing may be in the countries that jobs are outsourced to. Local production may be lost, because local companies are not able to compete. A dependent local economy may be the consequence.
Outsourcing functions as a kind of expansion of the American labour market. That may lead to downward pressure on wages. Real wages for average American workers have bare budged for the last couple of decades. Getting access to lower paid workers removes incentives for companies to move up the technology ladder and increase productivity, which they would have been forced to, if the American labour were more expensive.
All in all you can conclude that oursourcing in the present form is in the interest of business and less in the interest of broad segments of labour.