His estimates are conservative. As far as I know, he does not apply the ATCOR principle, the idea that ground-rent increases as other taxes are removed, which can hardly be questioned in a general sense, since value of land is precisely determined by the value of its opportunities of use. However, even 20% close to replacing all existing taxes. I believe Foldvary also points out that the need for transfer payments would decease dramatically in a system that distributed incomes justly and did not legalize the dual robbery of rent and tax appropriation.
His estimates are conservative. As far as I know, he does not apply the ATCOR principle, the idea that ground-rent increases as other taxes are removed, which can hardly be questioned in a general sense, since value of land is precisely determined by the value of its opportunities of use. However, even 20% close to replacing all existing taxes. I believe Foldvary also points out that the need for transfer payments would decease dramatically in a system that distributed incomes justly and did not legalize the dual robbery of rent and tax appropriation.
http://blog.sethroberts.net is still up, with the last post from a week ago. (though it will be updated much less frequently, for obvious reasons)