The Democrats who rule Illinois are in a taxing frenzy. Gov. J.B. Pritzker has big plans for spending, not enough revenue to cover it — and those inconvenient gazillions in debts from decades of statehouse mismanagement. His planned escape vehicle, a graduated-rate income tax, is edging toward the November 2020 ballot. Try to ignore the raucous applause from Pritzker’s fellow governors in Texas, Florida, Colorado, Indiana, Michigan and 11 other states that don’t tax personal income, or tax it at a flat rate.