Robotic workers

Another late-game addition besides delivery drones could be humanoid robot worker or worker drones. If the drone factory is implemented, it could share the same production facility. Basically they would act as another pool of workers for buildings, ships and offshore facilities, with the benefit of not requiring food and services, only needing a certain amount of electrical energy (and maybe maintenance?). Again they could utilize battery cells (if this production chain is added) and other late-game parts (electronics III, etc.).
In combination with robots a new edict could allow workers more free time, basically removing a percentage of the population from the available workforce but increasing unity.