And then of of course you get to the discussion of which regulations make sense and that is a very very broad discussion because there are people on both sides (guess on which side the big corps are..).
The pro-regulation side?
Want an example of how an more or less unregulated organisation behaves? Look no further than the NSA. Now imagine every megacorp having the same kind of unregulated power.
Then the question is, who pays for the NSA (or rather how does it earn money), and why would someone pay them (or buy their services) if they were private? (personally, I'm not as worried about someone trying to spy on me to find out what they could sell me, as I am about someone spying on me to see if they should send me to jail).
What about some open source resource management system which allocates base needs of humanistic psychology pyramid? so food, housing, water & nothing more. Then rest of society functions via anarcho capitalism for example.
This may actually end up being an intrinsic part of the anarchy capitalyst system, anyway, simply because for security and insurance, it is cheaper to keep people fed and housed, than to prevent them from using weapons to steal such necessities. NY did a study a short while ago where they found out it cost the government about $600 a month in police and medical expenses to manage each homeless person, meaning it would be easier to just give them $600 worth of food and housing.