There is brilliant way to solve it so that value and market-value meet. Keep the land always in market.
It's called Common Ownership Self-Assessed Tax (COST).
Land owner would self-assess the value of assets they possess, pay a tax on that value. The owner would be required to sell the asset to anyone willing to purchase them at this self-assessed price.
If you value the land high for any reason and want to keep it, you must self-assess the value higher than anyone is willing to pay for it and pay tax for it. If value it too low, someone might buy it.
It's called Common Ownership Self-Assessed Tax (COST).
Land owner would self-assess the value of assets they possess, pay a tax on that value. The owner would be required to sell the asset to anyone willing to purchase them at this self-assessed price.
If you value the land high for any reason and want to keep it, you must self-assess the value higher than anyone is willing to pay for it and pay tax for it. If value it too low, someone might buy it.