I think you're splitting hairs here. Banks already do offer interest rate discounts for loyalty or high value customers (eg: private bank clients) based on qualifying criteria. That qualifying criteria does not include being a government minister and putting the hard word on the CEO.
If the allegations are accurate, some of these upgrades were solicited well in advance, when those seats could otherwise have been sold to customers.
I agree that's the worst part. Joyce should have reported the approach to his own board and the authorities. The problem at the time was that the board were spellbound with Joyce and showed little interest in governance matters.
It does feel like the average paying customer is well down Qantas's list of priorities.