FWA allows the company to reduce pay on the basis of how much the respective PIA 'costs' the company. The response by the company needs to be in proportion. They'd be hard pressed to argue that the PIA costs the company a single red cent.
The case law given to QF drivers was that of a group of bus drivers in Canberra who refused to take cash for travel. Their union argued that they spent only 1% of the day doing this part of the job so that is what they should be docked. The company argued that they lost 50% of their income so that is what should be docked of the pay. I don't remember the specifics but FWA ruled on a combination of factors and it cost the drivers about 20%.
This one is not going to register a blip to QF unless they decide to be even more antagonistic than they already have.