 In 2011, Shafer successfully moved to override the veto of the zero based budgeting bill in the Senate.When the House failed to take up the veto, Shafer authored another zero based budgeting bill that was signed into law by Governor Nathan Deal in 2012.In 2013, Shafer introduced a constitutional amendment capping the state income tax which passed the General Assembly and was approved by the voters in the 2014 general election.