Just wondering what the reason is that the volunteer crew are going to be in charge over the regular crew?
Volunteer crew won't have seniority over regular crew although some will have had the extra SCCM training. The plan is that they will work with, but not be in charge of, regular crew. So, even a pilot with 30 years' service might be junior to the purser and find himself serving food and drink at the back of the bus.