> I don't think this system would be worse in that sense, probably roughly equivalent. But it makes sense to at least attempt to tax undeveloped and under-developed land at high enough rates to encourage at least some healthy amount of development. It won't be perfect, but it shouldn't be worse either.
I don't see how it can't not be much worse.
If the tax is based on the actual value of the property, there are two important factors:
1- You can easily prove or disprove whether the valuation makes sense. Just look at comparable sales nearby. If in a neighborhood of similar houses, ten have been sold in the past year for 200K and your very similar house receives a tax bill saying it's worth 2M, you can easily protest and win since the sales records show it's only worth +/- 200K.
2- If it really is worth 2M based on comparable sales, in worst case you can then sell it for 2M. While it's terrible to kick people out of their homes via property taxes, at least the consolation is that it's actually worth that. So you don't go bankrupt, you can sell it for that price.
With LVT the tax is supposed to be based on some theoretical projection of what it might be worth if a non-existing structure were to be there. What prevents the county from telling you that if only you built a ten story highrise there, it would be worth 10M? So now you have to pay tax on 10M.
You can't easily disprove it because, well perhaps maybe it's true that if the highrise was there it might be worth 10M. But of course the building doesn't exist so it's all speculation. Also, since the building doesn't actually exist, you can't sell the property for 10M to pay the tax bill.