It's actually pretty low in direct effect - if the government wants the corporation's secrets, or even for a coporation to take actions on it's behalf, there are plenty of both public and private agents within the company that they can use to act or steal or whatever. What's important about it is the act of subservience. The latter is a direct admission that "The corporation serves the state's interests", whereas in the US and other free countries the state serves the people's interests, and the corporation is a group of people with common interest.
This is why Citizen's United is so important a ruling and under constant attack - Because it asserts the primacy of the people to make their interests heard, in opposition to the model where people serve the state.
