"If people can't afford a house then they can easily look to other markets, they just don't want to because they feel entitled to "their county"."

Your comment is seriously detached from reality. If your whole life, job etc is located in one area, then moving far away for cheaper housing often isn't easy. It's especially hard for someone with a family.

UK and most other Western countries have high housing prices mostly because houses have become speculative assets for rich investors.