Have a read of the following wiki article on the UK miners strike to realise what you jobs may look like if the unions don't succeed.
http://en.wikipedia.org/wiki/UK_mine...ike_(1984-1985)
Like the voices of the Simpsons characters who took large pay cuts recently, you should have a good hard look at how you can restructure your activities to make them globally competitive.
Pilots are easily transportable - eventually you will have to accept some form of market rates to keep your jobs. Appreciate that you don't like this but as long as the company continues to provide the same level of training the public is in no danger.
Engineers - Domestic is hard to outsource but maybe the company could partner with a John Holland etc to establish new EBA conditions. At least the majority of these jobs are likely to remain Australian. International, you guys need to have a good hard look at how you remain competitive. Line mtc will always be required but it is hard to mount a good argument for retaining base and heavy in the country. Are engineers overpaid - well if you can buy labour for $50US in Asia per productive hour and you guys are on $120k plus super it is a no-brainer. There are some very good MRO's in the region now - United have a long term 747 contract with AMECO in China which is going well and there are many other examples. You could totally restructure your EBA to take some pay cuts for the guys at the top and not hurt the younger guys at the bottom. Getting paid for licences when the company doesn't even operate the type anymore sounds a little opportunistic.
TWU - catering and bag chucking will always be done in this country so there is no argument about going offshore. This union know they are onto a good thing compared to market rates and are trying to milk it for all its worth. Like always, if the company doesn't pay enough, it will suffer from high turnover, absenteeism and low motivation.
The market with some careful legislation to protect core rights is the way to go. Unions have a place but in my view some of them are going too far in an external environment which isn't conducive to thier industry. Hope you don't end up like UK Coal.