Funny though how your language makes the "non-machine tender" positions sound very robotic and machine-like: binmen, shelf-stackers, mailmen.

All sound like roles easily ascribed to machines. In fact, my garbage man is a truck driven which has a giant hydrolic hand which grabs the bin and dumps it into the truck. The driver has to minimally tend to the mechanical arm only when the bin needs a slight relocation (moved away from a different class of bin) to allow his arm to grab the right bin.