>A flat low fee of 5-10 dollars will just remove low-income drivers from the street, making it more complicated for them to earn their necessary income to survi

>A flat low fee of 5-10 dollars will just remove low-income drivers from the street, making it more complicated for them to earn their necessary income to survive while having no impact on behavior of the higher income drivers.move low-income drivers from the street To most of the people making the decisions on this sort of thing the incentive you've described is a highly desirable side benefit if not directly the point.