Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Why can't house prices be out of tune with salaries
I'd suggest changing the subject when your friends talk about real estate to save your sanity and friendship.  There's a difference between "belief" and "knowledge". Arguing with a believer isn't a very productive course of action, and will ultimately poison the friendship. Reality is a harsh mistress.