Both, you frothing lunatic! How can Europe go down (with the US in tow), and our own nearly inconsequential little economy - with us in it - not suffer horridly? Hang on - Is there a silver lining I'm not seeing in this impending train wreck???
Silver Lining:
(a) RBA rate at 4.75%, lots of room to cut if they really have to.
(b) Federal debt at 6% of GDP (from meomory, what ever it is its low), lots of room for emergency accomodative policy if they have to.
(c) buyers are on the hook, they dont pay the mortgage, the banks sells the property and comes after them for the difference.
(d) if things get tough enough AU$ is going to drop like a stone. This will actually be good for some sectors of the economy. Try telling tourism/manufacturing etc that Australia is in a 'boom' with the high AUD.
(e) Residential property might have appreciated significantly over the last decade, but it hasnt been a speculator fuelled boom, its still majority owner occupiers. I think from memory the ratio has declined from a long term 70/30 split (owner occupiers to 'investors') to around 67/33. Australians have a good historical record of making sacrifices to pay their mortgages, especially when its owner occupied.
Why doesnt anyone look at the default rates back in the recession of the early 1990's. Interest rates got up to 17%, people on the whole still paid their mortgage (yes loans were less, but rates where higher). In the early 1990's the banks nearly went under, but it wasnt due to residential property, it was from commercial/business lending.
(f) as some of the intelligent property bears have highlighted, prices are set at the MARGIN, ie the marginal buyer vs marginal seller. However the ability to repay a loan is not determiend by the marginal price but rather the loan amount is dependent on the purchase price, the purchase price is the time of acquisition. Therefore those that bought several years ago might not have purchased at the peek (at least in Melbourne)
Property prices will come back, but it wont be anything alla the USA situation.
Get a grip guys.