Property Tax did collapse, and from 1960 to 1980. http://www.freep.com/graphics/financial-history/detroit-bankruptcy-four-taxes-3.gif http://www.freep.com/grap

Property Tax did collapse, and from 1960 to 1980. http://www.freep.com/graphics/financial-history/detroit-bankruptcy-four-taxes-3.gif http://www.freep.com/graphics/financial-history/detroit-bank... This begets the downward circle the article refers to, i.e., that because of lower property tax revenue, they have to raise other taxes which in turn cause further decline, etc.