he/she is taking the piss out of you.
What he means, is that QF is opening bases up all over the world to employ cheap casual labour, instead of Australians. This can be seen on many crew, as the ratio of Aussies is on the decline.
I dont know if the possibility of an SFO base exists, but their is a rumour that QF is trying to get access to it (as a destination, not a base), after it pulled out years ago, and didnt realise there was a big waiting list to get back in.