Or something changed?
Why slaves cannot work in specialist strata?
In a situation when enslaved pop has trait intelligent, and weak,but free pop has trait very strong and industrius... its very illogical to put those weak aliens in mines. It would be much more effective if they would work as scientists, or at least some kind of science assistents. They still be slaves, but the point of having slaves is that they do something that free pop can not, or dont want to do, and thinking in this case, would be the thing. Its only an example, slaves could work in all specialist jobs, and still be slaves.
Why slaves cannot work in specialist strata?
In a situation when enslaved pop has trait intelligent, and weak,but free pop has trait very strong and industrius... its very illogical to put those weak aliens in mines. It would be much more effective if they would work as scientists, or at least some kind of science assistents. They still be slaves, but the point of having slaves is that they do something that free pop can not, or dont want to do, and thinking in this case, would be the thing. Its only an example, slaves could work in all specialist jobs, and still be slaves.