In an earlier life I was working for the Commonwealth Govt.....busy acquiring land for the second SYD airport at Badgerys Creek. Then many years later the Govt shelved it. Too many noisy voters purchased cheap land in the area (because it was near a proposed airport) and then later protested loudly about the prospect of an airport.
Can't see the new proposal being any different.
But then labor is not it power is it. So easy to make promises