The problem is, again, we don't know all the details.
While an airline like Qantas should, where possible support the Australian community and those less fortunate, at what cost is it expected to do this?
I certainly don't know details, but what is the cost differential? How did it transpire? For example, did the existing contract holder fulfill the contract efficiently, or was there supply problems? How about the price? Did the incumbant's price triple when negotiating the new contract, making them prohibitively expensive? While Qantas should do what it can, it can't be expected to do it completely at the expense of business practice, especially given the fact that the public want cheaper and cheaper flights. Its pretty rich of the public to bag out Qantas for using cheaper labour then complain about how expensive their fares are.
While we certainly have a right to be cautious and skeptical of some decisions (and we've all seen some of the terrible management decisions), but its a bit harsh to put all of the blame on Qantas without knowing even the basics of the negotiations!
The Comments of Mr Shorten, after discussing this decision, should give some view - "I'm satisfied Qantas is doing everything it can for people with disabilities".