Maybe there is no appetite for improving prison conditions because most people reserve their sympathies for the victims of crime rather than the perpetrators, despite all the inevitable cries from some quarters that it’s not their fault, they had a tough upbringing, society has failed them, they are drug addicts, alcoholics - we’ve heard it all before.
Meanwhile, long after prisoners have served their often derisory short sentences, their victims continue to suffer, often for the rest of their lives.
Personally I wish our prisons were as tough as the US ones, but no doubt they are on Joe Biden’s to do list.