1) the courts will not automatically grant the liquidated damages merely because it is stipulated in the contract.
2) The court will grant compensation only if the company has actually suffered a loss as a result of the Employee's early termination of contract. .
3) Hence the company which goes to court should prove that it has suffered a loss to the extent of its claim in order to get that amount, though it has been fixed under the contract.
4) in your case the company has spent Rs 6 lakhs on your higher education . further company must have incurred expenses for your accommodation , air fare etc .
5) you have not mentioned the period which your friend served company after return to india
6) your friend should offer to pay Rs 6 lakhs spent by company on his education in case he desires to leave the organisation