1. It was run in a test mode which seemingly resulted in some flights being over-crewed, and yet others not being crewed at all?
2. Insufficient crew numbers to cope with the flying program resulting in the PBS failing to deliver the much vaunted improvements in lifestyle?
3. Loss of control of the crews schedules would diminish certain departmental fiefdoms; which - to some at least - would seemingly be a truly deplorable situation?
...?
It's number three, number three I tell thee!!, oh with a little bit of one and two probably..... And that's far from proper Bo (selecta)!