Specifically, the group takes issue with this line from the legally-required pamphlet explaining the proposed changes to the state constitution: "This amendment does not tax retirement income."
While that's true — it doesn't — the group says the amendment will pave the way for another law that could raise taxes on retirement income, pointing to statements from Democratic officials and the Chicago Sun-Times' editorial board making the case for taxing the state's highest retirement incomes.
The state could tax retirement income currently, but it would have to do so with a flat tax on all retirement income.
"Progressive tax powers make it inherently easier to raise taxes, because lawmakers do not have to worry about facing backlash from all taxpayers at once," the Illinois Policy Institute claims. "This amendment would enable Springfield to begin taxing retirement income above a certain level, but then gradually lower the exemption threshold to raise additional revenue, slowly adding more Social Security and pension income to the tax base."