said by chgo_man99:Your privacy is protected. They don't use Social Security Number for everything. Its easier to find a job, especially the one for which you overqualify (lets say you look for a work after you got college diploma but in the meantime want to work seasonal at an electronics store).
They were the first to implement biometric chips in password before US.
need more examples?
And all of europe has national ID cards. The USA has none, technically.