Goes further than that too, suppose the one working on the wooden part is slow and the one on the metal part is faster. And surely the value of one part or another is also different, even though its the combined value that's relevant.
Suppose as well there are a thousand people lined up to make the wooden part but hardly any for the metal, then surely the ones who work on the metal part will (try to) command a higher wage too.
Suppose as well there are a thousand people lined up to make the wooden part but hardly any for the metal, then surely the ones who work on the metal part will (try to) command a higher wage too.