Well, in port everglades, the berthing fees paid by the ship cover line handlers, steveadoring/longshoreman, etc.
As far as I have seen, no one has ever tipped the line handlers, or the guy driving the fork lift moving bags to the ship.
As far as I know all the steveadoring/longshore services include all the personel.
Not a fact for sure, but your statement about what is obvious is clearly wrong.