A company called 'Mindscape' had created a game called 'balance of power', which was an unqualified success for the time.
After the fall of the Soviet Union, they set about to update the game, and decided to include the United Nations and even some economics in there.
Unfortunately, for them, they used real world statistics; which they quickly decided to change. You see, the original RW statistics they used turned the continent of Africa into a slaughterhouse of destitution and famine. No matter how they played the game, the African death toll was depressing.
So they released the game after cutting the effect of famine by a factor of 10.
Maxis found similar problems with their 'SimCity' game. If they made the game rules totally realistic, every city would collapse under the weight of its own infrastructure.
In real life, many of the most successful first world nations had a period of imperialism when they exploited the people and/or natural resources of 'others'. Indeed, it could be argued that America is the 'greatest nation on Earth' because it exploited the most people and resources for the longest time; and perhaps continues to do so. It could be argued that America is in decline precisely because they're slowly ending their exploitative practices.
If SC tries to build realism into their game, they would learn the same as those who have come before them. The top spots in the game would go to the most brutally exploitative leaders. Each world would be dominated by a handful of psychopathic Stalins. And everyone else would be mired in a morass of chronic debt and poverty made worse by their very efforts to alleviate it.
People always want 'realistic' but never 'realism'.
Schools, prisons, roads, rails, airports, water supplies, supply chains, hospitals, sure... But ONLY if it remains easily playable.
But who wants to deal with crime, the press, human and civil rights, terrorism, corruption, graft, fraud, racial, ethnic and sectarian violence, coups, foreign interventions, Intelligence, spying and their 'dirty deeds' dept.?
Where in this game can a guy 'Putin' a neighboring country?
Personally, I could see police, courts, and prisons dealt separately. And a way of exploiting the prison population as slave labor. Either to directly benefit a country or to rent them out to enterprises to exploit. Perhaps with a certain mortality rate among them, depending on their level of exploitation. We could create a whole 'cost/benefit' calculus to it with a percentage from 'total prison/total slave state' to 'absolute anarchy'.
Is that the kind of realism you would like to see?