There are plenty of people who move to large cities for better jobs, these people could just remain in the town they already live in instead. The problem you po

There are plenty of people who move to large cities for better jobs, these people could just remain in the town they already live in instead. The problem you point out then becomes a benefit. There are also people who move when they retire, or when they have kids. This could facilitate that happening earlier which would also reduce the pressure on housing in cities.