Originally founded by Greg Blankenship, the organization was relaunched by
John Tillman in 2007. It expanded its work and influence after Tillman took over. IPI raised $341,000 in 2007 and $6.4 million in 2016. In 2018, the
Chicago Sun-Times wrote that "Its studies and opinion pieces on cutting government spending and boosting transparency became must-read material to many Republicans, some Democrats — and the
governor of Illinois." The
Chicago Sun-Times described the group as "leading a crusade against government regulations, state spending and labor unions in Illinois." IPI formerly operated the Illinois News Network, transferring ownership of that entity to the
Franklin Center for Government and Public Integrity in January 2018. IPI has received financial support from charitable foundations associated with the Koch, Mercer, Uihlein, and Rauner families. ==Operations==