There could be a sequence of CGs required, starting with data acquisition (submitting settlement data packages), then materials (to support the cause and build modules), and then combat (to force the institutional slave traders into a position where they are forced to negotiate but without completely undermining the power play mechanics in the galaxy), with the module being the final reward to anyone who participated in any of the three at an appropriate level. If all are successfully completed, that power would stop trading slaves, and the practice would become illegal and not appear as a commodity at a station in their controlled systems any longer. Then, this sequence could be repeated until broadly institutionalized slavery is wiped from the galaxy.
One of the last things this game needs is more railroady CGs with foregone conclusions.
The funny thing about the comments about slavery being a fact of life, and the proposition that I am being unrealistic, is that it presupposes that there are no inspirational leaders, no heroes, no revolutionaries who step up and stop it. That is also unrealistic, as we have also learned from history.
By the standards of what Imperial Slavery is supposed to be, there are more slaves in my nation today than there was at the start of it's Civil War in 1861.
If a major superpower institutionalized slavery today, there would be global outrage.
They have and there is. The thing about superpowers is that they can ignore it, and the thing about everyone else is that they know they'd be hypocrites for pushing too hard on the topic anyway.
I doubt many people would want child sex trafficking into the game despite the legal comparisons between it and murder.
I assume it's already there.
Nothing even hints at there being a lower age limit for whoever happens to be in those canisters of slaves. The only rational assumption is that many of them are children and that anything you can imagine, and probably plenty you can't, is going to be done to them.
Possibly, though slavery as a concept certainly isn't just anything but a rather vile phenomenon and it isn't IMO entirely unreasonable to offended by it.
There are a lot of concepts I find extremely offensive that are staples of either the Elite setting or the game we have.
Government in general, the existence of money (fiat money in particular), police, and senescence still being a thing, just to name a few.
If the game couldn't offend me, it wouldn't be engrossing enough to play.