How is this different than a social insurance number/drivers license number?
It is very hard to do business with, or deliver services to someone when you cannot verify their identity.
It is very hard to do business with, or deliver services to someone when you cannot verify their identity.
A DL number can change over time, as your license gets renewed - an Aadhaar is by design meant to remain with you through your lifetime.
It has been in use for decades prior to Aadhaar.