First, it guarantees that no one dispossesses fellow citizens by obtaining a disproportionate share of what nature provides for humanity. Second, it provides revenue with which governments can pay for socially valuable activities without discouraging capital formation or work effort, or interfering in other ways with the efficient allocation of resources. Third, the resulting revenue permits utility and other services that have marked economies of scale or density to be priced at levels conducive to their efficient use. The rental value of land arises from three sources. The first is the inherent natural productivity of land, combined with the fact that land is limited.
All citizens have equal claims on the component of land value that arises from nature.
The component of land value that arises from community growth and provision of services is the most sensible source of revenue for financing public services that raise the rental value of surrounding land. These services include roads, urban transit networks, parks, and public utility networks for such services as electricity, telephones, water and sewers. A public revenue system should strive to collect as much of the rent of land as possible, allocating the part of rent derived from nature to all citizens equally, and the part derived from public services to the governmental units that provide those services. When governments collect the increase in land value that results from the provision of services, they are able to offer services at prices that represent the marginal social cost of these services, promoting efficient use of the services and enhancing the rental value of the land where the services are available. Government agencies that use land should be charged the same rentals as others for the land they use, or services will not be adequately financed and agencies will not have adequate incentive or guidance for economizing on their use of land.