Earlier quoted context omitted.
> - There are deeper problems with valuing land. Land values in cities are directly related to approved zoning (i.e. what you are allowed to build), so the city government can rezone neighborhoods and unilaterally alter the land values the residents pay tax on. This may not agree with everyone's view of fairness. That's actually a feature, especially if you make sure that the authority who can do the zoning also gets…
>> That's actually a feature, especially if you make sure that the authority who can do the zoning also gets the revenue (or at least shares in it). That way aligns incentives. This is only a positive if your goal is to upzone everything. If you think cities should be a mix of zoning and zoning shouldn't be driven by tax considerations, then this is very negative, since the land management department has an incentive…
(Before zoning was a thing there were already nuisance laws that forbade opening heavy industry next to a Kindergarten. No zoning required.)
In any case, people don't build high rises in the middle of nowhere right now. They won't start (or at least not much more than under the status quo) if someone drops taxes on structures a bit.
Also keep in mind that people don't get spontaneously generated. If people cluster together to form a high density area, some other parts of the country will see lower density. Ie if you let all the people who bunch up together, bunch up together, there's more space left over for the people who prefer lower density.
> If I have a lot of green space and few structures, and we convert to LVT, I will be taxed proportionally higher than before, or than my neighbor with less land and more structures. By taxing me more you are dis-incentivising my approach.
What you are describing is purely an effect of whether you tax structures or not. It's completely independent of whether you tax the land value.