People don't consider Joyce objective is purely in the interest of his business performance and by de-facto those employees that will have to be laid off when flying eventually resumes?. I'm sure most at QF don't wish their colleagues at VA to be out of work but would also side on wanting to keep as many of their lot with a job to return too.
The equation is simple: VA goes down = All of QF's employees very likely come back and many at VA's are employed at QF' and JQ just as it did happen after Ansett's collapse. Again I don't imply Joyce is doing it out of the kindness of his heart but purely as a business leader looking out for the performance of his business under very difficult and unique circumstances.