Two years ago, Michigan raised taxes on the working poor. It was reported plenty at the time; it should be no surprise.
If you want to be technical about it, the state didn't so much raise taxes on the working poor. It reduced the tax credits that went to the working poor. The Michigan League for Public Policy estimates that prior to 2011, the average low-income family in Michigan received a tax refund of $446. In 2012, that refund dropped to $138. The MLPP says the change means that about 15,000 fewer families were lifted out of poverty as a result of the credits.
None of this is news. The change happened two years ago.
Why bring it up now? Because right now Michigan leaders are considering another tax increase that will have a disproportionate impact on the state's working poor.