If an AGI can outclass a human when it comes to economic forecasting, deciding where to invest, and managing a labor force (human or machine), I think it would be smart enough to employ a human front to act as an interface to the legal system. Put another way, could the human tail in such a relationship wag the machine dog? Which party is more replaceable?
I guess this could be a facet of whether you see economic advantage as a legal conceit or a difference in productivity/capability.