Slavery or involuntary servitude can be re-imposed as a punishment

[Scuba]

10. And US Senator Ron Johnson (R-Wi) uses these slave prisoners to fatten his wallet.

http://www.jsonline.com/blogs/news/104605089.html

Companies operated by Ron Johnson, the Republican candidate for U.S. Senate, employed up to nine work-release inmates whose health care was paid for by state taxpayers.

The development is significant because Johnson has campaigned on a limited government theme, arguing that the private sector, and not government, is the best method for creating jobs.

The two companies are Pacur and Dynamic Drinkware, both of which operate in Oshkosh, and have been employing such prison labor since at least 1998, state records show. The workers are still under the custody of the state Department of Corrections and are paid by the two companies, but their health insurance and health care is taken care of by state taxpayers.