If anything, prison is kind of confirmation that there is a universal right to shelter and food. To put people in a prison which was not sheltered and to not feed them proper meals would be cruel and unusual punishment, but to homeless people its fine?

How is anyone meant to rehabilitate and integrate back into society when they are struggling to find their next meal and are not sure where they will sleep that night? Not to mention the hurdles they have to jump just to get assistance.