I suppose when you do the math, if property keeps outperforming inflation as it seems to do, eventually it will be too expensive for the average person to buy. But I dont believe that is a reason for the price to drop. It just means there will be a bigger differance between the have's and have not's. From what I have been told, this is what it's like in places like London. Most people rent because they just can't afford to buy. There does not seem to be a reason why affordability has to be sustainable.
I hear this a lot and it is completely illogical.
Lets say the renter can afford to rent but not buy the house they are living in. Then who is paying for the house?