It doesn't matter where those treachorously pinching the jobs of others are paid, they WILL be liable for Australian tax if they don't meet the Oz Tax Office's requirements for non-residency. They may get paid an amount into their "Swiss Bank" but if they don't declare it and the ATO finds out (it's amazing what information they get fed covertly) then the penalties are severe. The ATO changed the rules significantly recently, ask a lot of CX pilots.
If this Gilligan fellow is telling the potential job thieves otherwise (ie their salaries will be tax free) then they are being further led up the garden path than was at first evident.