But other than rile against the notion, I have seen no alternate proposal from the thread.
several people have given one: much higher sentences.
No doubt some rapists and murderers are beyond the pale and irredeemable, in which case life in prison is the only option.
This is how we control crime in our country. Our choices as a society result in policy, and policy is the lever that controls our crime rates. Some poeple are happy to pretend we do not control our crime rate, and that our actions and choices have no effect on the levels of crime, but the evidence is all around us that they do. We get the crime levels that our policies produce.
You have asserted this repeatedly and amongst your statements the most untrue.
In Britain, Canada and the US (and I think much of the rest of the world, but I am talking about those three countries because I know), crime has been falling for about 25 years, and most of that fall is a big mystery to criminologists. They have explanations for different places (for example, NYC simply flooded the city with police), but it really doesn't explain the fall in crime even locally, much less globally. They have also had to bin a lot of conventional wisdom during this time. A lot of people predicted that the market crashes in the late 90s and late 2000s would lead to a spike in unemployment and that crime would shoot up. It didn't. So, why crime is going down remains a mystery to people who study the subject.
Except apparently to you. You seem to think there is a direct correlation between crime and punishment. That turning the punishment dial directly affects crime and we can fine tune the crime level as we please. It's all within our control. I am pretty sure you are alone in that view.