blog posts Is a graduated income tax a Trojan horse to soak the middle class? Neigh! May 8, 2019 2:15 pm by Chicago TribuneIllinois in the News Share on Facebook Tweet Email Images Chicago Tribune (May 7) The UI/ Illinois Economic Policy Institute report, 'The impact of enacting a progressive income tax in Illinois,' found '13 states with graduated-rate income taxes lowered their rates (and) only two states … raised rates.' Share on Facebook Tweet Email