I'll add my own little data point to the pile. I changed jobs in 1998 so I fixed problems at two companies, small to mid-size. At each place they would have had problems if they weren't found and fixed. At second company they asked for volunteers to get paid extra to stay the night, eat pizza, watch movies and be prepared to fix things if they went south. They had enough volunteers that no one had to be voluntold. They weren't needed.
