That would remain an issue more relevant to the 457 visa debate. I think it more likely that Australia would have qualified pilots that are needed in Vietnam than vice versa. Which means opportunities for Australian pilots. eg: offer a bunch a experienced A320 pilots a contract in Vietnam for some fun and variety, and in the meantime more promotions and employment in JQ OZ.
Sometimes I get the feeling that everything GD does is automatically interpreted as bad for Australian pilots - it just might not be so in this instance.
Cheers, HF