That’s what you have managers for. The real question is why is the person in charge still employed if a critical business process depends on a single person.

I worked for a place where the CFO was diagnosed with cancer and was out for nearly 6 months. You know what happened? The Comptroller was appointed interim CFO and the CFO resumed his duties on his return.

All of these what ifs reflect a profound missing of the point. Instead of babies, think about injuries or extended jury duty or whatever. Any institution, whether a corporation, government agency or school, needs to be able to function independent of the individual employees.

If the magic mechanic or money lady is that critical, you already have a much more serious internal controls problem.