The butchers seem heavily limited in their possibilities. They hardly have permissions, so they only see the bodies while it is the programming that seems mostly to be protected.
It sounded like the whole package to me. With that line about 'the skin on your back' being telling about what would happen to Maeve if she were to leave (probably dissolve or some other precaution against rogue hosts).
But why hide it? We saw Ford using robots as straight up slave labor on his agave plantation and in constructing a ~new story~. If you're going to have a robo workforce, just have a robo workforce.
Tthere would be no good reason why management would hire horny young men to do what hosts could do too. Oh wait, I just figured what the reason is: the hosts would question their dream if they were in that position, like Maeve has. So, at least we know that the butchers must be humans then.
I know it would be on the nose, but something should probably have established that more rigidly. The only thing they had was the one butcher say "I'm human" in dialogue, but that's not really enough to set the rule, I think.
@China stuff: that's probably more a Crichton reference than a location clue. Crichton believed back in the 70's and 80's that Japan would basically be taking over global economy and inserted that in pretty much every book of his, until the Japanese economy tanked in the 90's.
It's not on Earth, due to the fact that "there are no animals in Westword, except flies". And if it were on Earth, as Crichton did point out, life would find a way. Flies that may travel along with humans on their skin and / or clothing have entered Westworld (probably in the early stage), but the notable exclusion of human co-travelers such as rats, mice, lice (and everything nice!
), cats, plants, fungi, and so on, must mean it's not an Earth location. It's kind of like water management on sea levels: you can build a wall all you want, but it doesn't keep it out. It finds a way.