Second, I don't think you are aware of how much of cities' financial troubles in North America are related to the budget imbalance between suburbs and downtowns.
Third, I'm talking about all the externalities. It's not just gas or street parking. It's also the cost of all those parking lots doing nothing productive. It's the health cost of having an overweight and sedentary population who can't even walk to get groceries. It's the cost of increased air pollution that brings hundreds of thousands of people to the hospital with respiratory issues. It's the cost to a city's economy that wastes a sizeable portion of its GDP to car traffic. Car owners pay only a tiny fraction of that.