I don't have a great sense as to how this works across the world, but where I'm at (Seattle) your property tax is a factor of both the improved and unimproved aspects of your parcel. The improved ones being the value of the buildings and the unimproved being the value of the land itself.
If you had a massive plot in an urban area, undeveloped, presumably the unimproved portion of your property tax would be quite high! But, the issue is that restrictive zoning means that typically the unimproved value of your tax assessment are pretty low.
For example, if you live on 2 acres, but zoning says that you can only put 1 dwelling unit per 5 acres, then you can't really do much with the remaining acres. As a result, the remaining land has little value, and the tax on it is low. This is especially true in areas of little industry, where the same zoning regulations might also prohibit industrial or agriculture uses on that same plot of land!
This is all to say that the structure you're looking for may already exist, but the issue is still in zoning.
I don't think you disagree here... Zoning changes and land value tax are both beneficial. In some cases like the example you gave where you can only build one dwelling per 5 acres, zoning would be a more significant problem. That's an extreme hypothetical though. In other cases, taxation incentives are more significant.
We absolutely need to push for BOTH zoning reform and taxation reform. They will work really well together :)
If you had a massive plot in an urban area, undeveloped, presumably the unimproved portion of your property tax would be quite high! But, the issue is that restrictive zoning means that typically the unimproved value of your tax assessment are pretty low.
For example, if you live on 2 acres, but zoning says that you can only put 1 dwelling unit per 5 acres, then you can't really do much with the remaining acres. As a result, the remaining land has little value, and the tax on it is low. This is especially true in areas of little industry, where the same zoning regulations might also prohibit industrial or agriculture uses on that same plot of land!
This is all to say that the structure you're looking for may already exist, but the issue is still in zoning.