Where I live, there's often master bricker (who does all the skilled work) and dumb labour assistants who are doing dumb work like moving bricks, mix the cement and so on which does not require skill. Master gets all money and assistant gets some low payment (something like $1-$2/hour). I think that assistant work could easily be automated. But probably in my country low wages would make it economically unviable. But in US something like boston dynamics robot dog might actually be viable for such dumb labour I guess.
The odd thing about "dumb labor" is that many of those tasks are only easy for humans. Dealing in a messy world of human-to-human interfaces and cluttered unstructured worksites is generally hard for robots.
The dog for instance might be able to drag a load, but would probably need help refilling it.
I expect dog to have a robotic hand and eyes, so it could refill himself, move bricks to a target location and put them onto the top of the wall, use stairs and so on. Of course it should not be a one-trick pony, the whole point is in something universal which could easily configured to perform different tasks.
