Welcome to krellinland, a mental asylum where the laws of logic dictate that the opposite to "A is X" is not "A is not X" but "A is Y".
As a consequence, the opposite to "If you tax ANYTHING you **necessarily** get less of it." is not "If you tax ANYTHING you do not **necessarily** get less of it." but "IF I increase the taxes on property, I will get more development". krellinland is a peaceful binary land, where everything is either this or that. And what is this and what is that is up to the peoples of krellin to decide,
As a bonus for visiting krellinland, you'll receive your own personalized strawman. For instance, if you talk about land value tax, you'll hear an elaborate on taxing property standing on the land, which is of course something entirely different than taxing the land itself. Nevermind your explicit statement that the supply of land is inelastic, something obviously untrue in case of buildings, which in itself should preclude any misinterpretation between the two; you must never outrule the possibility that land might be growing on trees in krellinland, as it is indeed a land of boundless possibilities. It is also a land where browsing relevant refferences on which an article is built is discouraged; indeed, instead of information in distilled form, only the pure original thoughts are to be disseminated. As such, I am glad to enclose the work of the original Georgist Henry George, who tackled the issue of land value tax in a very complex manner - http://www.henrygeorge.org/pchp33.htm