my point is that the exception carved out for punishment was not meant as slavery-by-other-means
Well, that's exactly what the 13th amendment says:
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.
It's pretty easy to conclude that using convicts as slaves was a part of the plan. Remember, this was 1865, 99 years before the civil rights act. Black people may have been freed from obligate slavery, but the completely unequal laws made it quite easy to funnel black Americans into chain gangs.
Just because some white people were also slaves now doesn't really make a difference.
Oh wow, so I need to get a car, camping supplies, and to take time off from work that I don't have.
This doesn't sound cheap, it just sounds like you have the means.
Be as apathetic about the state of the economy as you want. The rest of us will fight for a better life.