Hmm, perhaps I got mixed up, none taken, I get you.
Citizen, from my view, would be a member of the society, thus when becoming a politican, you sort of gain the control of society and therefore you're not longer a citizen or a civilian...understand? (You can be still a citizen, but you get a V.I.P. bonus when politican)
I may also meant the purpose of being a civilian being ranked to a politican.