This isn't really the case. First, to talk about the place I know best, cities in the UK outside London are pretty expensive too. The UK has a disproportionate

This isn't really the case. First, to talk about the place I know best, cities in the UK outside London are pretty expensive too. The UK has a disproportionate share of the world's expensive cities, despite being a relatively middle-income country. Demand isn't rising fast, it is just impossible to build (usually due to "environmental" planning regulations). That is an unforced error. Second, there are examples of large cities that don't have these issues. Berlin is probably one of the most well-known examples, they had a ton of public housing. They started breaking some of these buildings up, and guess what...rents are going up. Third, it is worth getting some perspective on this. There are cities that have almost no land that have managed much higher growth. Property in Singapore, for example, is expensive by international standards but, given per capita incomes and given the population density, they have actually not done badly (particularly when you look at access instead of average price). That is equally true of China (some cities in China have gone for 0 to millions of people...this makes the growth in most Western cities look flaccid). You could even say that New York has managed this reasonably well too (there has been investment in transport infrastructure at least, which is another cause of rising prices in some cities). It is hard to generalise about this because policy is often made locally. But I think it is also clear that part of the problem is local policy causing a problem in aggregate. That is systemic and unrelated to demand.