An example of which would be a manager who pressures an employee to keep working because the employee who is taking over their job isn't there yet and then acts as if they aren't the one making it the other employee's problem and it's entirely the fault of the late one.

The world won't end if that cash register is idle for a few mins. Hell, a manager should know how to run that register if it really is such a such a huge deal to have slower throughput for a bit.