I'm intrigued by your taxation of land argument. It appears that this theory is based on private ownership of land. I developing a keen interest in Libertarianism. However, private property is a cornerstone, as is reduced government and more individual freedom. I don't here much of this theory in any of the Libertarian articles I read.
Private property is a cornerstone of the Georgist philosophy.
For George, the moral basis of property stems from our rights to our selves, and thence to the products of our own labor. So, the right of secure tenure must be inviolate. I've read Henry George years ago, but I never realized the how the truth of his assumptions until recently. Just as Henry George insisted one hundred years ago, landlords do not compete against one another for tenants. Until recently, I would have to say we earned the money we got through rent.