Doesn't the 13th amendment to the constitution outlaw slavery? > Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party

Doesn't the 13th amendment to the constitution outlaw slavery? > Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction. If you've done anything illegal, they can't compel you to work? Seems to make this whole thing sound unconstitutional.