I would like to put in an opinion about the issue of incumency. Being an incumbent, most typically, gives a natural advantage to political parties of all sorts. Whether your system of government is corrupt or not, having control of the levers of power in the country gives you additional legitimacy, and those who vote without proper understanding of the issues tend to vote for the incumbent (which is what sould tend to happen with low con POPs, rather than making them Conservative). The party in power, whether they actually caused it or not, tends to become either blamed or credited for how the country as a whole is doing. If the economy is rolling along well, the nation is at peace or just won a war, and disease or disaster have not struck in a while, these things all tend to favor the incumbent. However, if your nation just lost a humiliating war, if the economy is in apparent decline, or if plagues, floods, or earthquakes have struck recently and caused significant damage, then the incumbents will tend to suffer for these things. Thus, a good model for the effects of incumbency would take into account how the country's POPs "feel" about how their nation is doing. This factor could be called "self-confidence" or something of that nature, and the higher it is, the more likely the POP is to vote for the incumbent, regardless of issues or party preferences.