Hmmm... The fact you present would not surprise me if the complaint about private prisons was that they allocate inhumanely small amounts of resources to prison

Hmmm... The fact you present would not surprise me if the complaint about private prisons was that they allocate inhumanely small amounts of resources to prisoner care while extracting the most value possible out of the prisoners and their families as is possible in the pursuit of maximizing profit. But the primary complaint is actually taxpayer expense, so what you say makes sense.