I don't know how close that is to canon though from what I read their system does sound like that would be plausible... *hisssss* poor Wynston. I do love his background and Wynston/Ruth are just *yay sweetness*.
The question that came to mind repeatedly as I played through my Imp alien runs (Zabrak Warrior, Chiss Agent, parts of a Chiss BH) was...what would possess any alien nonresident to choose to immigrate into the Empire? One might hypothesize that no one voluntarily does and all alien Imperial subjects are the product of annexation or slave imports, but that probably doesn't cover 100% of them and it doesn't account for the fact that the immigration scenario has occurred in real life. Look at the treatment of, say, Chinese or Irish immigrants to America in the 1800s, or any of the dirty unwashed race du jour in other time periods. Why would anybody walk into that and still say, for the rest of their lives, that moving to America was a good idea? The alternative must have been worse. I find that concept mindblowing, but then, I'm a pretty privileged creature, so I've never had to weigh anything like that kind of decision.
Unlike America the Empire does not reward hard work particularly well, but it rewards smart work brilliantly when you arrange to make it benefit/have it noticed by the right people. Then, on top of a successful professional career, happening across a sane Sith girlfriend is about as good as it gets. Then cuddles happen!