The Greens are making HB 750 central to the campaigns for governor and the legislature.

The concept of HB 750 is to increase income taxes while reducing property taxes to fund schools more equally. The liberal critique of schools is that they would perform better if they had more resources. And inequities in school funding further exacerbate inequities in society.
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However, as a matter of politics the Greens are probably smart to support HB 750. Since Speaker Michael Madigan supports the bill (see the Illinois General Assembly website) supporters of HB 750 see Governor Rod Blagojevich as the chief impediment.
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Teachers unions and other constituencies that would benefit from increasing the total money available for schools support HB 750. So, it’s probably more than a tax swap, it’s a tax increase.