Comment by TimPC

To be clear I'm not saying that Georgist taxes are based on the mortgage value I know they are not. I'm comparing the two quantities to establish a rough estimation of how expensive property in a Georgist society that provided a similar level of services would be. If government needed to generate a certain amount of tax revenue comparable to current tax revenue they likely need to charge homeowners an average tax on their unimproved land value that would roughly amount to 15+% of the value of the mortgage, across all levels of government.