Here's everything wrong wirh Australia's market in a few sentences:
The number of new loans being taken out by first home buyers has fallen by 11 per cent in a year, according to ABS lending indicators.
But the amount borrowed by them is up 1 per cent (because house prices are going up).
The value of investor mortgages rose 83 per cent.
Until there is tremendous change in the assessment of loan eligibility between investment and owner-occupied this rampant speculation will continue and whole generations will not be given the opportunity to own their own home.
FINANCE
Remove ability to use LMI for Investment lending (capping lending at 80% of value) would be a good start and over-time start to build an insulation against volatility in the housing market.
Reducing income from rental properties used for servicing to 60% of market rent (or tax return profits, whichever is lower) would reduce risky speculation even further.
This would dampen the market considerably, so to counter there needs to be an increase in owner-occupied allowance - either lower servicing buffers, or greater access to >95% lending.
GOVERNMENT
Separating Property losses from PAYG income for Tax (as they do for business losses) would be something relatively simple the Government could do through ATO. Stops Negative Gearing being used to offset PAYG income (instead carry-forward losses for when property does generate income).
Significantly increasing Land Tax and reducing/removing CGT concessions on sale would further reduce the incentive to speculate in the market.
Remove Stamp Duty on purchases for Owner-Occupied properties.