@Zetetic11235,
I know there hasn't been any activity on this thread for a while, but I've only just signed up, so please forgive me for reactivating this.
In regard to the original concept of prisoners being employed in their given specialties, speaking from some 14 years experience in the criminal justice system, the numbers of highly qualified prisoners (at least in the Australian system) is significantly limited. Speaking from an Australian perspective, the majority of prisoners have limited vocational skills or employment histories. Also, prisoner employment is legislated to ensure that prisons, both State and private, don't have an unfair advantage over privately owned businesses. Prisoners' wages in Australian gaols are fixed at rates well below anything paid in the community, this would give prison industries an unfair advantage in tendering for contracts. Also, employment is voluntary, so problems could arise in ensuring the completion of contracts.
Now, the concept of the penal system as a rehabilitative tool. There is research (I can't think of the references now, but they can be easily found on the net) indicating that employment and stable housing on release from prison has a big impact on recidivism. If the majority of prisoners have limited vocational skills and employment history, the use of prison time to provide the necessary education and employment opportunities could be seen as going some way to assisting prisoners to not re-offend. In regard to payment, prisoners should be paid going industry rates, but should also be expected to pay their own way in prison (accommodation and food at going commercial rates) in order to provide them with the skills to manage their lives more effectively in the community. This could be seen as slavery, coercion or any other label you care to place on it. On the other hand, it could be seen as an opportunity to provide prisoners with the necessary skills to stay out of prison. This is a fairly simplistic concept and would benefit from ongoing contact with external industries as is happening in some parts of South East Asia. Australian prisons do have limited "works release" programs where prisoners are allowed to work outside the gaols in private industries. Those programs should be extended and encouraged. We continually hear about a skills shortage in this country, however, we allow a large number of prisoners to be released with no significant improvement in their skill levels or work ethics. Seems silly, doesn't it?
BTW, in terms of the war on drugs and other harsh penalties, check out this site:
The Netherlands
Also, the US has the death penalty in some states, however, murders still occur in those states. Prison, the death penalty and prohibition do not stop crime, they only make the general populace feel more comfortable.
PaulG.