Now, now. When we think of Rapists, and criminals living in our payed-for-by-tax prisons, I'm sure only one thing comes to mind.
Weather you're an enviromentalist who wouldn't dream of touching an animal, to a fat, middle aged person concerned about the amount of tax you pay, you know that there's only one thing that could benefit you all:
Testing new drugs/beauty products/toxic chemical effects on serious CRIMINALS!
The idea has been staring us in the face for years! And not only does it mean that those prisoners won't last in the "luxury" of our prisons for as long, it also means that the test results will be 100% accurate for HUMANS! (Which means that when if product 1 would work perfectly on Chimps and Mice, would quickly poison humans, we would not have to find this out the hard way!)
This would also reduce tax via the lack of need to keep animals caged up for testing!