[wyago]

That's not really relevant to joeyspn's statement at all. He's not talking about an economic system, he's talking about a political system. While political systems influence economic systems, they don't have a one to one relationship. In the case of the US, we have a corporatocracy which maintains the current mixed economy.

[javert]

"Corporatocracy" cannot be an appropriate name for a system where most corporations are the victim of a few corporations that have governmental powers.

So, "corporatocracy" is not a valid word.

It would be like calling a dictatorship a "manocracy."

On the subject of political vs. economic systems: a specific political system implies a specific economic system, and vice versa, so there isn't the distinction here that you think.