India might use Iris scanning to identify airplane and railroad passengers, as well as everyone filing a tax return.

They are already arranging to track all the poor by welfare benefits, but even for the middle class, there would be no escape.

Iris scanning is currently not as nasty as fingerprint identification, because people don't leave iris prints in places where they go. But there is a danger that iris-scanning cameras will in the future identify people walking by on the street.