From an economic point of view, we should expect firms that compete for and rely on government contracts, such as weapons manufacturers and prison operators, to maximise the spread between the amount billed and the actual cost of delivering the service. If contractors can get away with providing less value for money than would the government-run alternative, they will. Moreover, contractors have every incentive to make themselves seem necessary. It is well-known that public prison employee unions constitute a powerful constituency for tough sentencing policies that lead to larger prison populations requiring additional prisons and personnel. The great hazard of contracting out incarceration “services” is that private firms may well turn out to be even more efficient and effective than unions in lobbying for policies that would increase prison populations.