Nandan was interviewed by Thapar as part of CNN-IBN's program "Devil's Advocate". Thapar surely asked all right questions except the UK card part. I have spoken to several people and everyone believes no such program can succeed unless people find a good reason to have them. In UK, no one knows why they should have a national ID. Same goes in US too (they eventually are not doing any similar projects except in the case of immigration or FBI).
In India, we keep aside 1000's of crores for pro-poor programs and we don't even know who is supposed to get. Only if we know who the people are, we can hope to reach them effectively. UID project attempts to identify these "face-less" people of India and provide these benefits to them directly through a micro-banking account. This can save huge sum of money for government and we can make sure it reaches the right people. We currently pay pensions for people who have died long back and we provide ration cards for "ghost" residents! I think UID will allow most of these systems (PDS, NREGA, LIC, PAN, etc.) be more efficient and hence be a self-sustaining system.
Here is the interview video link. have fun watching!