PS Krishnan, Retd. IAS, is a former secretary to the Government of India and former member secretary of the National Commission for Backward Classes. He was the Secretary in-charge during VP Singh's time resurrecting the Mandal Commission Report.
He was recently in Chennai to give a lecture on "Social Justice and Reservation" organized by the Chennai based Indian School of Social Sciences.
I have recorded the lecture and the subsequent Q&A session and am making it available here. This is a mildly edited version. I have removed one mindless question unconnected with the reservation issue (in the Q&A section), a few word repetitions, coughs, cellphone rings and other such noises.
[Links changed, 1st May 2008]
1. Sashi Kumar of Asian College of Journalism introduces PS Krishnan, followed by Krishnan's lecture on Social Justice and Reservation., 58.43 min, 26.8 MB, 64kbps MP3 file
2. Questions and answers that followed the lecture, 42.37 min, 19.5 MB, MP3 file
Quite a bit of what PS Krishnan said in the lecture appears in an article he wrote in Frontline, Apr. 22 - May 05, 2006.