The natural people (human beings) they are the real citizens. The corporations (juridical fictions) they submit to the Commercial Right, to the Consumer's Right, to the Civil Law, to the Tax Right, but they cannot vote or to be voted for public positions, therefore, they should not have political power.
In practice, however, the corporations and businessmen's clubs has more political power than the real citizens for a simple reason: they give moneys to candidates and they control like this the political parties.
The politicians or candidates to elective positions, for his time, implore votes to the citizens and they ask money for the businessmen and corporations. Chosen for the people after the election they don't have any conflict of conscience: they always assist first the businessmen and corporations interests.
This is a distortion in any modern democracy. And it is for this that we should struggle for the return to the DIRECT DEMOCRACY. Technical conditions for this already exist (personal computer, internet, safe password, cryptography, etc... ) the one what doesn't exist is interest (of the politicians) or disposition (of the population).