Ok, but then what do you do on weekends? Like you still need people, who have the skills to do the oncall work, to man the pager during off-work hours. Hiring

Ok, but then what do you do on weekends? Like you still need people, who have the skills to do the oncall work, to man the pager during off-work hours. Hiring a weekend person doesn't work (they don't have the skills since they're not really part of the team, + bus factor). Forcing people to work weekends doesn't work. Some sort of rotation seems the least worst option.