>The claim, which I disagree with, is that spreading those taxes across nearby land incentivizes those property owners to sell their land to someone else who will improve it.
The only claim here is that if you own land which makes you $1000 in income and pay $2000 in taxes for that underutilized land you'd probably prefer to sell up.
Which has to be the least controversial part of LVT.
>Which gets at another LVT problem that is glossed over in discussions: Everything assumes that selling properties and moving is cheap and easy. If grandma's forever home is surrounded by apartment complexes when she's 85 years old, her taxes would become unaffordable because she's paying her share of those apartment complex value taxes. She would just pick up and move, which we're supposed to assume is cheap and easy.
We're seeing the net result of your desired policy right now where retired boomers sit on 4 bedroom houses with 3 empty bedrooms while anything resembling this type of family home is unaffordable for actual families.
Personally I think I preferred it when retirees were given tax incentives to sell up and downgrade to a smaller property, because even though moving day is stressful, not easy and costs money, it's not worth sacrificing an entire society over trying to avoid it.