Should the government hire private companies to run prisons?

Private prisons are incarceration centers that are run by a for-profit company instead of a government agency. The companies that operate private prisons are paid a per-diem or monthly rate for each prisoner they keep in their facilities. There are currently no private prisons in Portugal. Opponents of private prisons argue that incarceration is a social responsibility and that entrusting it to for-profit companies is inhumane. Proponents argue that prisons run by private companies are consistently more cost effective than those run by government agencies.