This seems like a good idea when you see that last year just eleven of 2144 complaints were upheld by the current prison inspectors, who are employed by Corrections. Yip, just 0.51 percent of complaints are seen as valid.
Do we really think that a government department is so good that basically no complaints against it are upheld? I'm sure that seems unlikely to even a casual observer, and outright ridiculous to anybody who has anything to do with our prisons.
But why concern ourselves with guessing if this is right or not - if we bring in an independent body then we can rest assured. After all, if we are serious about reducing reoffending then we need to ensure our prisoners have faith in the system we want them to cooperate with it.