Everywhere in the world salaries, rents and prices go hand in hand.
Not true. There's huge variations in OECD countries. Here's a graph showing house price to income ratio. I know this intimately because I live on the far left :'(
That's a rather weird graph - it doesn't show house price to income ratio at all, even though that's its title. It shows change in that ratio since 2010. Tells you essentially nothing about the actual house price to income ratio.
