Do you have an actual quote from Joyce or QF where they have said the business case will live or die on the pilot EA?
The CEO has been quoted as saying that if a cost saving agreement cannot be reached with the pilots by the end of the year (now a proposal put to the vote that can be finalised by Feb 2020) then the project will be scrapped and the funds diverted to other areas of the group.
As I and others have mentioned before, if Project Sunrise balances so finely on the acceptance or otherwise of a percentage productivity increase through a Pilot EA, then the project should not go ahead purely on financial grounds. So many other variable costs (fuel, a Global crisis, dollar devaluation, even an inconveniently erupting volcano to name just a few) would render it unviable if the margins are that tight.