Comment by sjw987
Not everybody wants to carry a smartphone around all the time.
If the ID becomes about more than proving right to work, and becomes a daily carry, it's not hard to see the appeal of a government down the line tapping into an always on-hand microphone, GPS, internet enabled device.
Even putting the tin foil hat aside, I and many people like me enjoy leaving the phone at home, and want as little time spent on the thing as possible.