The concept of identity doesn't necessarily have to be embodied by a piece of physical plastic that goes into a wallet.

Ad-hoc identification can occur via other means like dynamic knowledge based authentication. The sources of this mechanism can be literally anything. Social media itself being one obvious source for the target cohort.

You can walk into many US financial institutions without an ID and still get really far using KBA workflows. The back office will hassle you for a proper scan of a physical ID, but you can often get an account open and funded with just KBA.