If the airport authority of india is capable of doing it(Airport Modernisation) on their own and raise the required resources there s no harm in giving them the go ahead.They had even submitted an alternate plan and it should have been given some thought.As seen in some news report both these metro airports contribute nearly 50% of revenue to the AAI so it would have been better if they had not been privatised....instead all the smaller airports and all greenfield airports can be privatised.