After a lot of discussions with wide variety of people, I have found something basic which differs between the stand of the constitution and the Youth for equiality and similar kinds are arguing ardently against reservation.
For those who oppose reservations, I have two points to think about. If you are convinced on those, the affirmation towards the philosophy of reservation according to me follows trivially. And if you are not convinced, catch me or Karthik somewhere on the coffee shack or CCD HN :-)
1. A suitable end for a democratic government is of equitable representation rather than of inequitable efficiency.
2. Reservations are meant for upliftment of socially (not economically) backwards because the scheduled cast community can no longer hope justice from the upper class.
Addendum: The above two points are highly concise and might lead to confusion upon a wrong interpretation of the words (eg. the exact meaning of Justice, upliftment, representation etc.)