Seattle is a city built by it's people, they have created ideal conditions for home ownership by participating in building a peaceful, prosperous economy which respects individual rights. By having foreigners coming in and buying this 'society' up - beyond the first generation of land owners - they are penalised for having built their own country up, as they end up unable to afford to live in it, burning up valuable income into paying high rents and house prices. A tax is one of the best way to correct this imbalance, by charging the cost of enforcing individual rights to those who benefit from it.