Prison labor

Why isn't prison labor successful?  Even though there are tons of menial tasks, the benefits are rarely enough to outweigh the maintenance costs of prisoners and prisons.  But there are still plenty of menial tasks.  Why not profit from agriculture or mining, for example.

"Chinese use of prison labor is an interesting case study of the interaction between capitalism and prison labor. On the one hand, the downfall of socialism has reduced revenue to local governments, increasing pressure for local governments to attempt to supplement their income using prison labor. On the other hand, prisoners do not make a good workforce, and the products produced by prison labor in China are of extremely low quality and have become unsalable on the open market in competition with products made by ordinary paid labor."

no because the bikes all go at different speeds, at different times, for different lengths of time. It takes energy to store energy, and with all these as well as other factors, you'd end up just wasting energy.

My name is tom and i stayed at a holiday inn last night.