is is that too hard to do ?
The price promise reads straight forward to me, and it's fundamentally no different than other guarantees offered by retailers, hotels, insurance companies except that you get 1 shot - which is fair IMO.
Personally, I think Qantas is screwing themselves out of a great revenue opportunity by copying what everyone else is doing.
What about something like this (disclosure: A major hotel chain I work with is testing similar).... During the checkout process have a checkbox "Yes, charge me an additional $10 and if these flights are, or becmoe cheaper on qantas or any of <list of sites> these sites within 24 hours - you receive an instant price drop and 5,000 points"
Not only does it turn pricing into a new revenue stream, it also has a higher psychological impact on the user since they believe Qantas is betting on their side with the added benefit of the user believing Qantas will pro-actively monitor other sites (something they can do VERY cheaply with the right partner). Any successful price drop found means the user has to be a QF FF member, and Qantas gets the additional added benefit of market price analytical data which can be used in real-time price differentiation eg:
https://channels.theinnovationenterprise.com/articles/8649-how-big-data-is-changing-the-way-you-fly
Marketing will like it as it's a more streamline and has more power than the current price promise.
Marketing will love that it's a new proactive technology they can promote
Loyalty will love that it will push more FF memberships
Users will love that the burden is put back onto Qantas
Ancillary revenue will love the increased ARPU
And then also threads like this wouldn't pop up
Everyone wins - Problem solved - what's next RedRoo?