on an individual level maybe it's (partially) subjective, but marx is concerned with the systemic level. he's talking about the industries which really drive th

on an individual level maybe it's (partially) subjective, but marx is concerned with the systemic level. he's talking about the industries which really drive the economy i don't think there's ever been a successful attempt to reduce macroeconomics down to the microeconomics level. basically, the system as a whole cannot be calculated by summing up a model of all the individual behaviors, it doesnt work that way. there have been several broadly successful macroeconomic models steve keen talks a lot about this same type of stuff and he's very much not a marxist, if you want a different perspective on it