A Slave is a Slave is a short story written by H. Beam Piper. It's set in the Terro Human Universe. First appeared in ‘’Analog’’, April 1962. Republished in the collection Empire and in Ministry of Disturbance and Other SF.
There has always been strong sympathy for the poor, meek, downtrodden slave--the kindly little man, oppressed by cruel and overbearing masters. Could it possibly have been misplaced...?