Increasing Sydney is getting more and more crowded and congested. The Greater Sydney Commission estimates that at least 1.74m more people will live in Sydney by 2036i. Is this a sustainable objective? That is a debate for another day.
(However, as an aside, it is time for a fast train to Bathurst and to build a new inland city with a large relocation of government employment to the West.
The unrelenting demand for Sydney property is another example of lack of sustainability, an immediate suggestion is only citizens of Australia may buy Sydney property, no settlement of any property purchase can occur until clearance is received. As Sydney people are competing with the world for property. There are two sides to any market demand and supply. All discussion has been on supply rather than what is the problem with the demand?).