I wouldn’t call “ex-president of the union being 15th person charged in conspiracy embezzlement” a low grade corruption: if that’s low grade, what would high grade corruption look like?
One of my first jobs was working part-time in a grocery store: collecting shopping carts, "clean up in aisle 7", stocking shelves, etc. I was 16 and forced to pay dues to a union. The dues were deducted from my minimum-wage paycheck. I had NO opt-out option. I worked maybe 10 hours per week? I was a high school student. I got ZERO benefit by paying union dues. This extortion was corruption in itself, nevermind the executive-level corruption that makes headlines every few years.