The issue of who you are going to sell your property at current inflated prices is slowly but surely arising.
The young saddled with HECS debts and cost of living pressured have basically given up on owning a home and spending what little savings they do manage so it won't be them. The birth rate is below replacement levels so without immigration you are cooked by that slowly and surely.
There will be a flood of baby boomers falling off the perch and supply will go up for that reason alone even for those that manage to avoid the nursing homes.
Japan already has totally free houses for these sorts of reasons. Thats right totally free.