By: Mark Glennon* If you’re scratching your head about why public unions are thrilled with the override of Governor Rauner’s veto of SB777, which reduces taxpayer contributions in the near term for Chicago’s police and fire pensions, here’s why: Overlooked by our ace press corps is the funding guaranty in the bill. Starting in 2020, taxpayer contributions increase to whatever-it-takes, sky’s-the-limit, annual contributions sufficient to fund the pensions, and property taxes automatically increase to cover those amounts. The bill also mandates that revenue from any casino in Chicago go towards pensions. So, public unions are thinking