The Chicago metro area and surrounding "bedroom communities" in Cook, DuPage, Will and Lake Counties contain ~57% of IL's population and a majority in the House and Senate. The Chicago metro area has the political ability to vote down the entire rest of the state. The problem is that Chicago, which is NOTHING like any other part of the state, thinks that what is good for them is good for everyone. There may not be a more arrogant city government and population on the planet. They are not content just to damage themselves, just to make themselves victims, but want everyone in the state, and the country for that matter, to be as helpless and State dependent as they.
Because of that, unless something happens mightly to change the the population in IL (many of us have said for decades that the people of southern IL need to buy the O'Leary's a new cow), or to change the mind of the Chicago area citizens, there is nothing legally that the other 43% of the population living in the other 98% of the land area of the state is going to be able to do about it except utter words of objection and revolt.
Even if they revolt, to Chicago it is just like the scene from History of the World:
Count de Monet: It is said that the people are revolting.
King Louis XVI: You said it! They stink on ice!