Both right
In the UK both have much to be blamed for. Certainly Flight and Cabin CRew have always made excessive demands as to how much, where and why. Management have never got a grip of things and crew costs are still far to high and will prevent significant improvements.
The ground force is equally as militant hanging on to many old work customs and practice. Just when it could not get any worst there was JAR ops a garanteed process of wasting more money, the recession, low cost operators and the war, over to you.