effectiveness of bonds

Bonds are the instruments used by companies to make sure that their investments in companies is not wasted or employees after getting the requisite skills from a company join another better paying job. The fact of the matter is companies such as Infosys, TCS and Wipro have excellent training facilities and most of the fresh graduates which join them do so just to have the taste of the excellent campus and facilities. So the question arises as to how you stop these same employees once they get trained by the company’s resources. Companies have come up with an excellent answer and that is bonds.
The terms and conditions which a company states may sometimes prove detrimental to an employee’s prospectives. The bond restricts the free mobility of labor and thus the employees are left stranded in a job they don’t really like. Companies sometimes have terms and conditions which are cruel. There is a need for a bond which is reasonable for both the employee and employer. Protection of a legitimate business interest as well as due consideration to the employee is required. Some companies like satyam do have very stringent norms like having to pay interest on the amount not being used. Thus in order to handle such cases, an employee needs to be careful in signing the bond.
But the question arises as to how effective the bonds are in limiting the employees from leaving their job and just paying the compensation that the bond has specified. Thus there is a need to look into the effectiveness of bonds and their role. Are they accomplishing the purpose for which they are designed.