Wisconsin has a law called Minimum Markup, which “mandates that gasoline and other certain products be marked up at least 9.18 percent above the wholesale cost.”1 For gas, studies and commentators estimate the cost impact is $0.10-$0.32 a gallon, or an average around $0.20.2 And this “tax” doesn’t go to the public coffers. As Rep. Dale Kooyenga explained, it goes into the pockets of private business:3 big businesses that have been long-time supporters of Governor Walker.4 Governor Walker has refused to repeal the Minimum Markup Law in order to increase transportation revenue.5 Fix our roads Governor!
2 https://www.jsonline.com/story/news/politics/2016/08/23/wisconsin-law-raises-gas-prices-lawsuit-claims/89204498/; http://www.bradleyfdn.org/On-Lion-Letter/ID/322/Wisconsin39s-minimum-markup-law-costs-motorists-302-cents-per-gallon-according-to-WPRI-report; https://www.badgerinstitute.org/BI-Files/Special-Reports/Reports-Documents/painatthepumpjuly2008.pdf.
3 https://rightwisconsin.com/2017/11/27/kooyenga-to-republicans-minimum-markup-law-is-anti-free-market (“‘At least a tax goes to your school or roads. This is a tax that goes to a private business,” Kooyenga said.’”)