Corporations exist solely because the state grants them the title; this should be the only association you need to see why one would advocate the other. It's a mutually beneficial relationship they share; the greater the reach of the political force, the greater the reach of the corporation. It doesn't matter who you vote for, all that matters is that you believe in the political system, that, if you can just get the right people in charge, the world will be fixed; this further enables the corporation to eliminate competitors and get closer to monopoly status.
Of course, the reality is, the idea of a republic is millennia old with no innovations and the same flaws that plagued so many republics of the past are plaguing the republics of today, the issue being: elected officials abuse their power for personal benefit until either the republic is overthrown or the nation is weakened enough by the political leeches to get conquered by a stronger political force. The only people the elected officials answer to are the voters, and if the voters ever believe they can't change things without the political process, it's game over: the political process is believed necessary to existence and to overthrow even a heavily corrupted government is understood to be suicide. Boom: the door for abuse slams against the wall with a crack and the evil flows right the fuck in.
It's an abusive relationship; say there's this girl with this guy, and the guy says, if she ever leaves him, she'll be nothing, she'll be dead, she can't leave him no matter how badly he treats her because the alternative is non-existence. And things aren't all that bad, you see; she still gets fed, entertained, and has a roof over her head, which beats starving and living out in the wild. So why change? She's comfortable, the beatings aren't all that bad, and who knows what'll happen if she leaves? Maybe there really is nothing out there, maybe she will starve or die without her man; maybe she really is worthless without him, as he keeps telling her. When you believe your entire existence is dependent on just this one person, you will stick with them, no matter what. That's why things are so bad today: societies are the broads with black eyes who won't leave states bearing stained wife-beaters; everyone, EVERYONE knows this situation is fucked up, at least on some level of consciousness, but nobody's doing anything about it: they're comfortable.
Well said. So perhaps in our lifetimes nothing will change while enough people are comfortable and we currently seem to have limited better options - bitcoin is not even "ready" or tempting enough as yet to mainstream for example. It could take another 20 years to take control of our own money then next up we have energy companies and want ever else to battle.