How would the price of labor drop to virtually nothing?

Alright, so we get AGI. Now what? Sure, a lot gets offloaded to AI-powered robots and disembodied entities, but how does that actually drop the cost of labor to zero? There’s still power bills, right? The robots aren’t self-maintaining. Even if the tech/AGI side of things plays out flawlessly, the big bosses are still gonna hoard power and fearmonger. So how does this whole thing sort itself out? Human employees are gonna exist in some capacity too I'd wager. Especially in the 3rd world where the infrastructure is sputtering along... thoughts?