Quite right a good read. The only point I would add is that increased LAND prices ought to encourage multi dwellings where there used to be only 1 (obviously STCA). This better use of our land resources would save a lot in infrastructure costs and perhaps get prices back to realistic levels.
I agree that higher density is the only option for Australian cities. However NIMBYism will fight it at every stage. We are seeing several suburbs protesting now over the Brisbane city councils changes to zoning in areas are major transport hubs. Also we need better quality multi dwelling units, having lived in Europe for 10 years, apartments there are much better than what gets built here.