that's right, but a strong tax base is not an accident. detroit's leadership just never "grew up" when the plants started closing. in cincinnati, most of the Procter and Gamble manufacturing went elsewhere (though HQ stayed) and one of the biggest GM car plants (Fischer body plant in Norwood) closed, as did Cincinnati Milacron, LeBlond, etc etc (factories). they are all now replaced by mixed use developments (food, shopping, condos, etc).
detroit was just run by hacks.