So, here is a personally observed anecdote of dockworker union 'productivity':
I worked on a cruise ship for two years and sailed all over the world. At one particular port with unionized dock workers, we arrived a few minutes earlier than our anticipated arrival time (6:53am...scheduled for 7:00am, which was the Union start time). The Captain steered the 135,000ton vessel into a tight 'parking spot,' between two other ships, fighting the wind and current the entire time. The Deck crewman shot the small lines across to the dock workers that were standing by the docking cleats, drinking their coffee. The first line lands perfectly, right at the feet of the unionized dock worker. He looks at it, laughs, and watches as it falls into the water. After all, it's not 7:00am. All he had to do was bend down and grab a small rope two inches from his shoe. Nope, not doing it. Better, apparently, to keep the Captain burning fuel keeping the ship in place than secure the giant ship to the dock.