The Federal Correctional Service of Canada has a prisoner training program that teaches inmates to produce furniture that is then used by other Federal Government agencies. The chairs, tables, cabinets and couches are not sold to the public so there is no competition with commercial furniture makers.
The inmates also operate farms, where they grow food that is used by the prison kitchens, to feed the prison population. Obviously, these prisoners are low risk to escape.
Canada Post has a contract with the Federal prisons, to make and distribute mail bags and mail shipping containers, as well as sand bags for the Canadian Forces, and emergency preparedness groups, for flood control.
So Yes, In Canada we use prisoner workers.
Jim b. Toronto.