My thoughts are more intuitive than informed and studied. In general it's most likely a bad outcome to give sovereignty over me to a corporation whose explicit goal is to take from me as much as I can sustain. Corporations have demonstrated that they will rape the commons, given the chance.
More specifically I fall back on the US Declaration of Independence:
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.
That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, ... etc etc
By this statement, governments are created for the benefit of all. Corporations are created for the benefit of the corporation, and as they get hyper-large they don't even serve the needs of their own employees; they become self-aware, and their survival and growth becomes their reason for existence.
Governments can be concerned with my interests. It's impossible for corporations to play that role.