There is always an easy solution. The hard part is finding an easy solution that's not wrong. For example, having people pay directly for their road and mass t

There is always an easy solution. The hard part is finding an easy solution that's not wrong. For example, having people pay directly for their road and mass transit use is an excellent easy solution, the hard part is addressing air pollution externalities. So toll roads, private mass transit and carbon/pollution caps/market.