'negotiate in good faith'
I love that logic. We'll keep punching you with strikes, you keep talking.
I don't agree with the union striking, I also don't agree with a lockout. But if you are going to strike, then you should expect that a lockout is a possibility. If union members were not aware that QANTAS could be locked out in response to their constant industrial action then that is a matter that should be taken up with their representatives.
As I said before - it's reminds me of the school kid on the bus punching someone in the back of the head for 10 minutes then crying fowl when that person turns around and punches them back.