It would take a few idiot buyers out of the market.
I've come across a few people who've told me about their big investments and it's pretty clear they can't do maths.
It seems more or less all the lingo and myths they've heard, "saving tax, bank's money, double in 7 years" lured them in and they'll be very disappointed in the end. In the meantime they've just nudged someone else out of the way to grab a house.
There are plenty who know what they're doing and they'll just adjust accordingly.
