the truth sometimes reveals the MO.
If f/o slots seem to have been awarded out of seniority/start date/bid group/general normal order of things, that would most likely be contributed to the fact that the company made a small error of judgment and instead of Melbourne base, the A330 all of a sudden is Sydney based. No prizes for guessing why a few F/O's would say "hang on a minute"....
A move to Sydney for 5%. You do not need to be a mathematician to work out the fallout.
Ladder climbing would be the only reason from that angle. The fact that out of order seems to be the case is an indication of the testicular fortitude some F/O's have here....
Kudos to those who gracefully turned down the offer....