I think I agree with you they try to get for themselves unfair advantages by influencing policy and government . And is rampant and unchecked in the world and is on a global scale, this is one of reason Militant came up in Nigeria mainly people from oil region.
But I think them being part of policy makes it easy for them to survive, as big corporation is always at risky without government back-up by making favorable policy.
They only problem I see here is going off limit to the extend of affecting the society and small businesses negatively.