Postby Arioch » Sat Mar 02, 2019 4:16 am
The chief benefit to slavery is that you can force people to work for you who otherwise wouldn't. Normal colonists stop producing yields when they become discontent, but slaves keep working.
The secondary benefit is that you can do inhumane things to slaves that you can't do to free people, like work them to death for a labor boost, or perform scientific experiments on them for research.
Is there any reason to enslave content people who would work for you freely? Of course not. A free worker is always going to be more productive than a slave. Slavery was included as a mechanic for the Gremak who have specific traits that help them take advantage of it (and who were supposed to have more alien morale problems than they currently do). It's available to anyone if you have contact with slavers, as we don't want to prevent the player from doing whatever his black little heart desires (within reason), but it's not meant to be something that otherwise benevolent players have any incentive to use.