I don't blame the tech but the manager of the site who authorized the work while the system was servicing patients has thee sick patients and one dead body on his or her head.
It's probably an issue of the incentives under which the manager of the site is operating. If corporate HQ reacts favorably to a memo like "Overtime was authorized to remove a very small risk to patient safety", such things will happen. If HQ is only concerned with the bottom line, and bases the facility managers bonuses, job retention and promotion prospects only on the bottom line, such shortcuts will continue. In other words, a fish rots from the head down.
It also helps if you have a medical director who won't tolerate shortcuts to safety to safe $$. Basically you need a neph who is comfortable with the few hundred $K (s)he earns, and isn't concerned about squeezing more $ out of the clinic.