1) People that want to fix their own code. They usually don't have to be told "you have pager duty" -- they just care. They even become upset if they don't know about the page and will even install their own paging systems without your knowledge.
2) People that can't be bothered. They dont' answer the phone, don't answer slack - instead they just watch a re-run of the mindy project and eat ice cream while your production system is crashing.
Generally people in 1) fix things for 2). Wage theft is really from group 2) - because they steal from 1). Each time I have fixed something for group 2) - I either fire them personally monday or start an all out campaign to get them fired. Firing is hard. But letting the entire team down just makes it easy. Ironically, if you want less pages just fire more of 2).