and people who have over stretched themselves to buy houses at over inflated prices over the last 10 years but I doubt these people make up the majority of the population
I strongly suspect they represent a higher proportion than you might think. That part of the financial services industry was going MENTAL before the beginning of this year!
I agree, a house price slump (plummet, nosedive) might not on it's own represent a problem for e.g. the aviation industry. These things rarely happen in isolation tho', the knock on effects are already being felt, and may get worse. "may" get worse, who am I kidding!?