There is in fact a whole, and very famous, book about it https://en.wikipedia.org/wiki/The_Jungle https://en.wikipedia.org/wiki/The_Jungle It is as much a rea

There is in fact a whole, and very famous, book about it https://en.wikipedia.org/wiki/The_Jungle https://en.wikipedia.org/wiki/The_Jungle It is as much a real object of specific concern as it is shorthand for "oppressive wage slavery in poor conditions" in the general sense.