call button, that's an old rumour. It's been the 'default' position of many QF crew since Jetstar was first announced. When asked about it the standard response from anyone in management is that 'there are currently no plans for that to occur'.
Perhaps we should go with tunedog's suggestion. Wait, let's think it all the way through. Where do we get 25 767 aircraft worth of capacity in the short term? No big orders of replacement aircraft due in the next couple of years. So that's not going to work in the short to medium term.