Next year's big debate over how to reshape the Minnesota tax system will include a serious discussion about school reliance on property tax levies. That's if incoming Senate Majority Leader Tom (bock) Bakk gets his way. Bakk says he wants to minimize the need for schools to go to local taxpayers to fill in funding gaps. A Minnesota Public Radio report said Bakk's desire for change comes from his belief that levies have put school districts on unequal footing. Ninety percent of Minnesota districts have such levies in place.