[Barrin92]

American society != every society

This doesn't happen in Europe. Part of the social contract over here is that criminals who have served their sentence have the right to have their fundamental rights restored. That in fact is the justification for punishment in the first place.

A society that takes on the authority to punish individuals must integrate these individuals after they have payed their debt to society. If they wouldn't the punishment would be arbitrary, cruel and serve no purpose.