Is the implicit expectation that people making something should have some correlation with their ability to buy that thing?

The assembly-worker making a Civic and a 7 Series BMW are doing effectively the same thing, but the BMW assembler shouldn’t be getting paid 3 to 4x.

The reference to Marx and (implicitly) the labor theory of value renders the GP unserious. Just looking at the people doing the assembly (and not all the people in the supply chain), ignoring the time aspect (I doubt there's any product that costs more than one of the people assembling it would expect to make over the time it would take them to single-handedly create the product from scratch), and so on.

It's a nonsensical position, meant to invoke a certain sort of feels, and nothing more.