You are all naive, Qantas has won, they will out lawyer you all, use forensic accountants and the big 5 accounting houses to bombard the arbitration with their story, it will be up to Unions to refute, you better have deep pockets as this is going to be a long and very bloody fight.
Discovery in legal proceedings is a 2 way street, out come all the secrets and embarrasing Emails.
There are lots of precedents for this, QF are not alone, they are following a well worn path and expect to succeed.