I must apologize for my lack of clarity. The intent of my statement was to say that "Cars should pay for..." and "Public transit users should pay for", not to imply that the users of these services cover their costs now. Cars are obviously subsidized by general tax revenue, and public transit is also subsidized by general tax revenue. Ideally general taxes would be reduced by the amount spent on these services, and the costs for these services would be increased accordingly.

My bad. I read it as "since cars pay... transit should pay too".