Mayor Bloomberg writes in a New York Times op-ed: "unions also play a vital role in protecting against abuses in the workplace, and in my experience they are integral to training, deploying and managing a professional work force."
Whatever experience Mr. Bloomberg is referring to, it isn't his experience at Bloomberg LP, the company that made him his fame and fortune. That's a non-union shop that has somehow managed to train, deploy, and manage a professional work force (or at least professional enough to make Mr. Bloomberg a billionaire many times over, notwithstanding our complaints here from time to time about its news coverage) without unions.