And this is a fantasy. Some land is marginal: Taxing it more would reduce the profit anyone could make from it to nothing, leading to empty lots that aren't owned by anyone because the last owners were delinquent on taxes to the point the local government took the land from them and is now trying to auction it off. Look at houses in Detroit being sold for a dollar for an example of this. The city makes no money from those.
https://99wfmk.com/detroits-one-dollar-houses/
> It sounds like a good deal...a dollar for an old decrepit house – but then what? Then you have to pay for all the repairs, renovations, excavation (if needed), property taxes, lawn work.....so you fork out just one whole dollar but you wind up spending no less than six figures getting it in shape. Whether you plan to keep it or sell it is a moot point. You're still out that money.
Plus:
> The moral argument is that nobody built the land out of their own labor, they only conquered it.
Turn a piece of land into a farm and say that.
https://news.ycombinator.com/item?id=37913341
> The idea is that you tax the land only as if it was being used for best use - so that every property is encouraged to develop to maximum density.
So by definition, the "best use" isn't very valuable. I suppose the definition doesn't strictly include residential usage, but it's not hard to see that some land is inherently less valuable for residential as well, because location matters.
"Tax the land as if was being used for best use" is an oversimplification. The government can't realistically know what the best use of land is, or what value that would command. That's for the market to decide. But the point of an LVT is that you're taxed on the base value of the land (as measured by how much profit your neighbors are making off it), and so only usages of the land that are better than average remain profitable. If none of your neighbors can turn a profit on it either, tax will be negligible.
The arguments for an LVT fall into both economic & moral categories. The economic argument is that the elasticity for land is zero. It's always there, always will be there, and no human action is going to change that (barring things like landfill, which are a literal edge case that doesn't matter much in the grand scheme of land area). The only economic questions are "Who owns the land?", "What kind of returns can be generated from it?" and "How is it distributed?" As a result, a tax on land has zero deadweight loss. Most taxes reduce economic activity by disincentivizing the transaction they're taxing; as a result, productive activity that would've occurred without the tax never occurs. Land is different. The land will still be owned, just by different people, regardless of how high it is taxed. That means that the government can raise revenue without curtailing economic activity.
The moral argument is that nobody built the land out of their own labor, they only conquered it. And so what right do they have to monopoly returns from its ownership? Land was commons that existed before humanity, and so returns from ownership of it should go back to the commons, in the form of funding (presumably democratically elected) government and public-sector improvements that raise the value of the land for all.
Property on the land is different, in that it is built through human labor & ingenuity, and the returns to doing that should accrue to the people who actually do it (or compensate them for creating the built infrastructure).