If you think that's morally unobjectionable, fine, but I'd love to know what happens when all the landowners who own rural land that doesn't have a profitable development path attached to it can't pay their tax bills. Have the state seize it all?
Or do they just claim it's of negligible value and avoid the tax?
The market will bare it because people have no choice. The choice is homelessness or paying the higher rent.
It's principally the same when mortgage rates rise. Landlords with mortgages put up rent. Only it would be worse, since not all landlords have mortgages.
If it doesn't have a profitable development path attached, the price(and therefore "value") will go down, as will the tax burden.
Property is already taxed based on its assessed value in California.
Labour in the UK introduced a 20% inheritance tax on >£2M rural property.
https://www.theguardian.com/uk-news/2024/nov/01/farmers-shoc...
Although the rules were later somewhat changed. Perhaps after pressure due to terminally ill farmers committing suicide (before the tax came into effect so that they could pass on their inheritance).