(Editor's note: This article was published first at Illinois Policy Institute). Taxpayers could soon have more faith in Illinois’ budgeting process as legislation that would insulate them from tax hikes is ready to be heard in the Senate Appropriations: Revenue and Finance Committee. Senate Bill 589 would create a “spending cap” that ties Illinois’ general revenue appropriations to growth in the median household income. It is sponsored by state Sens. Suzy Glowiak Hilton, D-Oakbrook Terrace; John Curran, R-Lemont; Steven Landek, D-Burbank; Jason Plummer, R-Vandalia; Doris Turner, D-Springfield; and Dale Fowler, R-Harrisburg. In recent years, state expenditures have grown nearly twice as fast as the typical taxpayer’s income, culminating in the two largest tax hikes in state history and relentless calls for even higher taxation.