I agree with some of the sentiment in this thread that property can still be afforded by those prepared to save/sacrifice and then leverage to the max, but at the same time it's pretty obvious that housing costs have risen substantially over the last 15-20+ years even when taking into consideration the lower interest rate environment.
30 years ago someone saving hard for a home could probably have put away a 15-20% home deposit over a couple of years. Today they would be saving maybe 5-10% over a similar time frame. So they are leveraging a smaller deposit toward a larger mortgage (nominally as well as relative to their income)... and in the lower interest rate environment they are more at risk from even slight interest rate rises.
In an environment with 12% mortgage rates a 1% increase in rates burdens the borrower by an extra 8% in interest costs... a 1% increase in rates when mortgages are 6% is an extra 16% and this increase is even further amplified by the higher average LVR today than in times past.
Regardless of whether the current generation can survive on two minute noodles so they can live the dream of owning their own home, it seems fewer are choosing to do so. You can see this from the volume trends, especially over the last couple of years. Problem is with so much vested interest now in prices continually rising the government keeps stepping in with various grants and subsidies to try and get people buying again and at higher prices.
Now the shoe is on the other foot, rather than the young complaining about prices being too high, it's current owners complaining that the young aren't buying and that prices are falling... oh the irony