I am not sure what your point is. If a police officer has contact with you, he is going to ask you to identify yourself. I would think most would ask for proof of identity, mainly because they deal with the worst the country has to offer and they usually lie.
State law or not, the officer is going to request ID, however your point was that if the feds issued id, then the country would turn into a police state even more than it is now.
Please explain why.