I'd say the comparison for any new system should be the espionage system: Especially in the late game, such systems need to be small, precise, easy to understand and use and only provide positive effects (no negative ones for enemy civs). There's enough going on already in the late game. A system for corporations as described above (which is similar to the civ4 system, right?) mainly adds more bloat in that you need to spread it to cities and build buildings for it. I wouldn't really like that. In any case, the question is asked the other way around: "what gameplay effects could we need in the late game", and from that on outwards a Globalization/Corporation system can be designed.