[mfer]

Security is one good reason.

Fraud and people trying to mess with the system has been a long term problem and likely always will be. The results of which can hurt people. Keeping details private can make it more difficult for those folks.

If we try to prioritize goals of a system like this... security for people should be one of the highest. I think of the middle income single parent when I envision an example of a person in this system.