Judging by the posts that have been posted on this forum over the last few months, there seems to be more incidents in the land of oz than in the godzone. Mind you, that could change because of our ozzie perceived safety standards.
I suppose more cabin crew might prevent cabin doors being ripped off by airbridges. Get a grip. The only safe way to operate aircraft is to leave them in the hangar.
There is always going to be an element of danger in aviation and safer operations is managed by a state of mind (mindsets, human factors, good CRM) not by numbers of employees.