I just finished reading Bawa Satinder Singh's 'Raja Gulab Singh's Roel in the First Anglo-Sikh War' on JSTOR, and holy crap, that was a read. Basically, this Raja Gulab Singh sold out his Sikh homeland to the Brits (though he wasn't the sole perpretrator of this) so that he would be able to consolidate power of the Punjab for himself.
It got me thinking, that regardless of the various cultural blocs in the world, there are some universals to human nature, particularly those in power acting in a Machiavellian manner. The same, I feel, would apply to EVE. I think the whole 'grimdark' thing is apart of it, and amongst all of the factional leadership of EVE, this exists.
However, sometime I feel that just because the governments of such factions are full of a-holes that this applies to the citizens as well, which I think is a bad misappropiation to make. You will have selfless and selfish people across all stratas...however, when selfless individuals make it into a position of power, they may develop a form of societal disconnection from reality which makes their actions appear questionable...or perhaps they realize the bad consequences of what they will do, but subscribe to a 'ends justify the means' type. They DO exist in EVE (see, Souro Foiritan in 'The Paths They Chose'), and not all Machiavellian...
The so-called 'underdog' factions seem exempt from this. There seems to be an assumption in parts that 100% of the Caldari and Minmatar are onboard their faction's goals to the death, because they cannot be possibly be considered apart of either faction otherwise. But as history shows us, Raja Gulab Singh sold out his own people just for his own self-gain. Indeed, in a capitalistic system such as the State, self-gain would be incredibly tempting, and thus would exist in equal measure as it does elsewhere. There's likely plenty of Minmatar who don't give a shit about the tribes either, and just want to pursue their own goals. Millions more will be apolitical, and simply not care, just getting on with their life (Das Boot is a good example).
Amongst all four factions, realpolitik would be rife, where powerplayers will wave the flag of ideology and cause, while secretly having an ulterior motive for material/power gain. I do not think the Amarr and Gallente are the only perpretrators of this, but the Caldari and Minmatar just as much. "We are invading this system to free our Minmatar brethen, the Amarr there will pay the price for their infringements of freedom" = A clan chief being able to wrest control of local resources for himself without having to care about the native populace.
But again, this applies to people in power. Large blocs of everyday individuals may sincerely believe in something with no shadiness behind them, and this is reflected in the society as a whole.