The shooter is a sovereign citizen.
What part of the world could they not keep people in similar conditions as a supermax? If it’s a matter of money and that’s the only reason they don’t have them, that seems like an argument in favor of funding them, not in favor of the death penalty. I can’t think of another reason.
Incidentally, the fact that the U.S. is the only Western country with the death penalty, sharing that honor mostly with theocracies and dictatorships, should tell you something about the ethics of it.
The hypothetical doesn’t need to exist in reality. It’s part of the thought process. It’s not meant to be an argument for a realistic applicant of the death penalty. Again… I oppose the death penalty.
Now imagine a society (this can be fictitious) without the resources to house criminals indefinitely. How do you manage using resources, to the detriment of the innocent, to house criminals with a life sentence?
We don’t need to imagine it. It’s on that map I posted. All those non-dictatorships that don’t have the death penalty are able to manage it. i.e. the entirety of Europe save Belarus, Canada, Australia, New Zealand, and many other countries.