Unfortunately overtime bans in Sydney wont do damn thing. They have recruited in the past 2 years,put on the casual retiree brigade, this has killed all the overtime. If anything is going to work in sydney it will need to be no higher duties and intense scrutiny during inspections.
If some sort of action is required, it will be interesting to see if the retiree's support their workmates, or their managerial mates who keep them employed when there is no real manpower requirement to have them.