This will be an incredible challenge and I'm curious to see how this plays out.
To my knowledge, there isn't a single country that has a comprehensive biometric database of its adult population: not Lichtenstein; not the UAE -- both rich countries with small populations.
Can India pull it off?
There are 804,043,947* Indians aged 15 years or older.
There are a certain number of non-citizen "usual residents."
For reasons both technological and logistical, this is the identity management equivalent of the moon shot.
*CIA World Factbook:
Population: 1,156,897,766 (July 2009 est.)
Age structure:
0-14 years: 30.5% (male 187,197,389/female 165,285,592)
15-64 years: 64.3% (male 384,131,994/female 359,795,835)
65 years and over: 5.2% (male 28,816,115/female 31,670,841) (2009 est.)
1,156,897,766 * (.643 + .052) = 804,043,947
