Land titles and patents both have similar characteristics and both could be taxed by value to discourage idle use.
The key for both is that the government is providing exclusive security of tenure over some natural opportunity in order to facilitate production. But if people take the opportunity but don't do anything with it, whether for speculation or laziness, they are excluding others. That would only be acceptable if they have paid the community for that right to do so.
The key for both is that the government is providing exclusive security of tenure over some natural opportunity in order to facilitate production. But if people take the opportunity but don't do anything with it, whether for speculation or laziness, they are excluding others. That would only be acceptable if they have paid the community for that right to do so.