I would assume that they don't tire, have as many safety issues, and don't mind the weather. Plus they don't go on strike. Throw in as automation improves then

I would assume that they don't tire, have as many safety issues, and don't mind the weather. Plus they don't go on strike. Throw in as automation improves then efficiency will go up and this will make moving goods even cheaper regardless of source. The more we can move people out of physically dangerous situations the better. That crane operator sitting in the air conditioned office certainly sees a benefit. Eventually the cargo will get loaded on robotic trucks, trains, and the like, and its trip across the country will be similar. Akin to changing the whole distribution process across the world into a large scale warehouse.