Dr Stephanie Kelton has laid it out, nice and simple in two articles in New Economic Perspectives (links below) for those who really want to know, how government fiscal policies work in a real as opposed the idealised neo-liberal economy. It is not the way most commentators and politicians seem to think it does.
Excellent post by Ronan Lyons on his blog. Smart taxes is negotiating his services to find exactly how much a Site Value Tax can raise and how quickly it could be implemented in Ireland, to report by Autumn this year. Geographical Information Systems (GIS) and better property databases have simplified this work beyond the valuation professionals imagination.