QF fuel savings of $13m a year for ten years = $131mil for ten years.
The reality is that for that sort of money, every runway that Qantas operates to in Oz could be fitted with cat 2/3 ILS with autoland.
Airport owners like Melbourne airport, SACL, even Mildura Airport - they have no motivation to install infrastructure like ILS. They'll build shops and cafes and carparks - because that's how they make money. In fact, why install an ILS with autoland at Mildura? If aircraft are holding and diverting, you'll have big delays and you can sell more carparks and coffees in the terminal while they wait. How many new ILS have been built in Australia in the last 10-15 years? Less than five? Yet traffic has exploded.
GDP, STAAS, enroute holding, transition to GNSS - it's all bandaid solutions to crippled infrastructure.
This is the chickens coming home to roost after privatisation of federal airports. We have massively under resourced system - and no one with motivation to sink money into infrastructure. Airlines are expected to do more and more, with less and less. Eventually the holes in the cheese were going to line up.