Aren't these figures guaranteed by the government, not the union in question?
In that case, Australia could certainly afford to bid.
It brings 20 teams to Australia, with ~30 players per squad and ~10 staff per squad.
That's 800 people already who need food, services and accommodation before we consider a single fan.
It then attracts hundreds of thousands of fans flocking in from all over the globe who purchase millions of tickets to the games, many of whom will stay in the country before and after the tournament. The sheer amount of global eyeballs provides a massive sponsorship opportunity for Australian brands and it allows the Australian government to show off tourism opportunities within the country.
Essentially, the Government would fucking love for it to happen. They'd definitely be able to table offers to be competitive with any other Tier 1 country.