That plus flights from Australia are expensive enough in economy, business class is easily 4-10x that cost.
If you are a point hacker you could spend the points on upgrades (which tend to give you better rates than buying base tickets) but then you're paying for a minor comfort improvement that you wouldn't pay for normally -- which is a textbook example of induced consumption and is playing into exactly how airlines want you to use points.
Or ones which do but the outlets are so loose they are practically useless.