Why do we have to pay a $.50 toll to exit the Garden State Parkw

Cape May - Why do we have to pay a $.50 toll to exit the Garden State Parkway northbound and enter southbound at Exit 4 (Rio Grande), yet you can travel from Exit 0 to the exits at miles 9, 10, 11, 13, and 18 (Sea Isle) and get on and off without a toll? This disparity primarily impacts the people in the Cape May area, including Lower Township, and probably has a negative impact on the businesses in Rio Grande because of the additional cost to get there from the south. Please write to your representatives and ask them to correct this unfair situation.