"But it's probably much more complicated to carve out that one specific instance of tax exemption for charitable entities, rather than to require a tax payment by the donor at the time of transfer as a way of blocking that 'escape hatch' from the appreciated asset income tax."

good morning albaby, my way is more efficient and practical. The donor fills out a one-page form at the time of donation, to establish their cost basis at the time of donation. As the foundation, charity, etc, liquidates the asset, the 20% or so cap gain tax would be paid from the proceeds of sales. IF property appreciates over time higher tax receipts will be realized. IF the asset drops substantially prior to sale, no one pays tax of assets that deteriorate in value over time. Been there done that bud, that's why it's fair to wait to tax donations until they are sold. Trust me on this. Have a grand day.