Remember that some people dont want to go to London. They want to live in Scotland. (this same argument applies to many places, some London people would hate to

Remember that some people dont want to go to London. They want to live in Scotland. (this same argument applies to many places, some London people would hate to move to Scotland, some people from rural England do not want to move from that part of rural England etc.). So there is a pool (of some size) of labour that really wants to stay in the area and is probably willing to earn less rather than move. For a business this can be an advantage.