All I'm saying is that it's not just about housing prices. Hub airports tend to be in densely populated areas where there's simply not much room for a big airport. Schiphol has the advantage that it's in a fairly empty polder with mostly farms, but there are a lot of towns and cities around it.

The decision on whether to allow an airport to expand is a careful balance of a lot of different concerns. An honest government or regulator weighs those concerns honestly, but because of the financial concerns surrounding a big airport, there's always an incentive to game the system.