Very high overtime can mean a unit is short-staffed, or that overtime is not managed. It is one of the most-read parts of any sunshine list.
The Open Contracting Partnership's guide to red flags puts it this way: a red flag is not evidence that anything wrong happened. It points at something that may be worth a closer look.
Counted by employer, job title and year. The government's lists name each person; this page does not repeat the names.