The plan is based on a national identity system with 80% penetration:

> So far, India's attempt to assign every citizen a unique 12-digit number associated with a person's unique iris, fingerprint or facial features, is succeeding—just last week, Aadhaar reached its milestone of registering 1 billion people. With more than 80 percent of Indians enrolled, it gives the payments system a solid base to build on.

This reminds me of an article I read awhile back talking about the things that technology has made disappear. Farms. Factories. Horses. Many diseases. And so on. It ended with the question: what fixtures of current life are likely to disappear in the future?

A commenter responded with one word: "privacy."