Yes, and at this point, it seems that the more useful model is to look at the govt as an extension of the corporations.
My generalization is that for a society to function, while some concentrations of power are necessary (at a minimum to allow specialization, e.g., infrastructure, policing, military, legislation, executive functions, etc.), the key is to minimize and actively avoid concentrations of power.
The largest and most dangerous concentration of power in modern times is the corporations, as we are seeing with Cicizen's United, decision, regulatory capture (FCC, Copyright law extensions, current dismantling of EPA, other regulatory agencies, etc.).