They’re politicians. They caused the budget issues, and now they have to find more money. They want to raise taxes, but have to find a way that will not hurt them politically. They choose to tax ‘sugary’ drinks, because they can sell it by saying they’re only concerned about the health of their constituents. In reality, if they could put a tax on milk and not get slammed for it they would do this too.
Maybe Cook County socialists are starting to run out of other peoples’ money to spend.