Pissing off the Empire might have an effect on the lives of regular Minmatar. Or then the entire purpose of the Minmatar Republic might be to be a thorn on the side of the Amarr Empire, keeping them from becoming too powerful. If any of the four main empires would get too dominant and able to start to ignore other empires military-wise, they might have time for further scientific advances. Which might not be optimal for all. What did Sansha Kuvakei find out? Were the True Slaves the real reason the other empires suddenly forgot their differences and attacked his Nation?
As for the Federation, it is quite romantic to think the nobles held power in the first place. If Gallente nobles are anything like our nobles, they were in debt (fiscally) to the movers and shakers of the financial world.
Who controls the shareholders of the State? Do they also have influence on the Guristas? The megacorps compete with each other, and while they superficially have made somewhat permanent alliances (factions, blocks), Oceania still has always been at war with Eurasia. (For the reference, I understand it is hinted that in Orwell's 1984 there may be a World Government that simply keeps its citizens under control by making war with itself.) Of course, that kind of doesn't fit the State, but a secret (not-so-Mercantile) club of important shareholders and other powerful people would fit the setting very well.