1. Discuss the taxation history and problems. Explain Mankiew's point of view (in the EconTalk) on gasoline.
2. What would Keynes do? How about Chicago school perspective (free market perspective). "The Tax Man Nudgeth." Freakonomics Radio podcast.
https://freakonomics.com/2013/04/03/the-tax-man-nudgeth-a-new-marketplace-podcast/
https://www.econtalk.org/archives/2007/01/greg_mankiw_on.html