This is why "Rights" need to be restricted. When you allow corporations to have a "political voice" because people can't have their "rights diminished in groups," you get absurd results like corporations bribing politicians with campaign funding and drowning the voices of people who are not in corporations and can't command the level of money businesses do.
It also creates the problem of double representation. Each individual of the corporation has a voice, and then he has a voice AGAIN as a member of the corporation, only with vastly more resources attached to it.
Rights need to be "curtailed."