I've read that the heavy crane operators -
with their very powerful union - are deliberately working very s-l-o-w-l-y to unload container ships and load the trucks waiting for the containers. Pulling all sorts of cr@p like making
some truckers wait longer (hours or even days) to get loaded. Entire crews for ALL of the cranes take off together for 2 hour lunches. And of course, complaining brings retaliation.
Experienced crane operators are assigned to a specific crane/shift, and make ~$250,000 a year. Junior operators can be moved around, and make "only" about $200,000 annually.
Running 24/7 doesn't make much difference if the crane operators aren't doing their d@mn jobs properly. This sort of reminds me of the stories I heard about union work slowdowns from workers building Liberty ships during WWII.

I can think of solutions . . . but they would NEVER fly in a D-controlled state like Kali.