Korea has worked around this by providing SMS verification, PIN numbers that are generated through the government's website, or even a locally-stored public key

Korea has worked around this by providing SMS verification, PIN numbers that are generated through the government's website, or even a locally-stored public key cert. There are ways to do it, you just need the backing infrastructure to make it happen. The American SSN system is a joke nowadays and needs to be overhauled, it could go hand-in-hand with online verifications. Mind you Facebook is a global company, and tailoring these solutions to every country would be nigh impossible.