Interesting views like the 8x8 cell! Well why do we put people in a Prison? To prevent them from offending and to safeguard the population against them. We hope of course to be able to rehabilitate them, but that we don't seriously do, simply because it costs a lot of money. Particularly the "first time imprisoned", (I wont say first time offender probably more first time caught!
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If you are going to do it right, and it has been done, you have to have a plan and a regime, bit like my own experience in the 60's, the regime was fairly brutal to begin with, never be allowed today, (Human rights!) the physical violence, the degradation, (every night at 9pm for the first 3 months you had to lay on your bed naked, and when the duty officer came to your room, you had to raise your legs in the air, then turn over so every inch of you could be checked for any rash etc. It was known as "Flesh inspection. Sounds cruel but when you have hundreds of young men all living in close proximity something like scabies could spread like a bushfire!) Then gradually regimes were relaxed, and harsh discipline was unnecessary as people had developed "self discipline" -- first rung on the ladder to criminal rehabilitation too? Then the teaching and training to the point you were ready to leave fully trained, capable, and self reliant -- isn't that what we can aim for in rehabilitation?
Perhaps when you break the law some of your Human rights are broken too? Start with the "8x8" perhaps, back into prison uniforms, no TV, no Radio, continual drug searches and kept well away from other prisoners. After a statutory period some relaxing of the regime, a chance to perhaps associate with others for limited periods. During all this phase compulsory physical exercise (costs money!) Followed by interviews and assessment, (Money), then more association, games and sports opportunities (Money!), beginning of proper training and education (Money), eventually to relaxed conditions in open prison, (Money). Finally interviews and job opportunities and if necessary Government funded (Money) employment for minimum 1 year. (Money). At any time -- the surety that break the rules and your sentence is doubled and back to the beginning -- break then make.
Perhaps Prison could be used to develop people, and their "Human Rights" managed rather than just granted?
But all this would cost a lot of money, and need a Government with the will and support of the people! Then they can have all their Human Rights back when they leave!