Soviet Legislation Publishers in 1936 published Ot Prestupleniya k Trudu (From Crime to Labor) by I. L. Averbakh. Look at what Aleksandr Solzhenitsyn wrote in The Gulag Archipelago about Averbakh’s view of slave laborers in the Soviet Union:
Following in his teacher’s footsteps, Averbakh similarly elaborates: The task of Soviet corrective-labor policy is “the transformation of the nastiest human material [Do you remember raw material? Do you remember insects?–A.S.] into worthwhile, fully useful, active, and conscientious builders of socialism.”
The Gulag Archipelago, Volume 2, p 104