I was pretty young when I saw this sometime between 1959-1963. Perhaps it was on one of those anthologies like CBS Playhouse. I believe it takes place in part of the U.S. that has been occupied by a foreign power. The protagonist is a prisoner in a concentration camp during winter. They are melting snow for the water to make concrete or mortar for the walls they (similar to the Berlin Wall) have been ordered to build. The one scene I remember is that he is having a philosophical discussion with the commandant about the best society for humans and he expects to be free sometime in the future. The commandant tells him he sees a "future of camps like this one, and man is to serve his life working for the State" or something like that.