If you don't use willingness to pay, how else are you going to measure how much people "need" to drive on a road? Willingness to pay is a great heuristic for need, and the information from people's willingness to pay is automatically integrated into the entire economy through the price system.
If you don't use willingness to pay, how else are you going to measure how much people "need" to drive on a road? Willingness to pay is a great heuristic for need, and the information from people's willingness to pay is automatically integrated into the entire economy through the price system.