I think it's less cultural and more size based. It's eaiser to implement this stuff in smaller countries.
If you'll notice all the model "left leaning" countries are very small. Countries like UK and France try to copy them, it tends to not work out and they have to come up with their own less efficient systems.
For us it'd be problematic since the place they are put has to be like an island... also we'd need enough islands for our giant prison population when our island to landmass ratio is no doubt a lot smaller.








