Thank you for the input. Interesting logic, all.
I don't mind having to transport the Galactic Citizen to a planet of my choosing. There's a reality there, and real risk too; I've lost a few to pirates. But yes, the Galactic Citizen always being born on the home planet seems not right. He/she should be able to be born on ANY planet in my civilization, maybe partly due to what's going on on that planet (lots of research, a real bang-up center for ship manufacturing, etc).
Tell me if you think my math is correct. I'll use Scientists as an example, but it can be applied to the others, too.
At the base value, a scientist can produce +3% when working for the government, but can provide a whopping +30% when stationed on a planet. That 30% number rises as the Scientist learns the locations of the labs, bathrooms, and best sushi places and gains more experience in all those things. A level 8 Scientist can bring a 38% boost to a colony's base science. Three level 9's and a level 8 can add 39+39+39+38 = an added 155% to base science.
I can add 155% to Earth VI's science production with those Scientists. From here, it's merely a math problem, right?
Let's say the base science on that planet is 12. 12+155% comes to 42.6.
Now, if I want to put those scientists to work for the government, they would be contributing only 3% each to Earth VI. In this example, 3X4=12% But they would also contribute a +12% to every other colony. If I have a series of research based planets, this could eventually boost science more than just assigning them to a single planet. And I can leave my more experienced scientists on the colonies, while assigning young scientists to the government; no need to get them to level up. That can help mitigate the risk of travel in mid-game when the pirates, monsters, and Drengin are creeping about my part of the galaxy. It also helps mitigate the risk of losing a colony to a conquerer, as long as I don't lose my capital colony.
I'm thinking that I should take advantage of both. Working in colonies AND working for government. But having a hard time figuring out how to decide when to populate the government and/or colonies (except for the risk factors noted above).