Dec. 15, 2022 With the state anticipating a $6.5 billion budget surplus, lawmakers have plans for a major overhaul of Wisconsin’s income tax structure. Senate Majority Leader Devin LeMahieu says the senate is currently working on plans for a phased-in 3.5% flat tax. Although championed by conservatives, the flat tax is not party specific. Wisconsin’s democrat stronghold neighbors, Illinois and Michigan, both have a flat tax. Reliably Republican Indiana also has a flat tax, and Iowa is currently phasing one in. Grover Norquist told the MacIver Institute early this week that voters of all stripes strongly support flat taxes. In …