This is pretty management focused.
As a non-manager I would like to add, if decision makers don’t suffer with me then my phone goes on silent at night. Otherwise, unless you’re working on a critical user facing service, there’s often no incentive to spend effort making things reliable when you can just use on-call as free hours.
My current contract currently says roughly:
I’ve been called once since I got here, and I was actually disappointed I couldn’t remember my code to get into the office (you only need the code after 6pm :<).