Regulate them, limit them and in extreme cases kill them. And the thought that corporations are cancers of human societies that cheat is not a new.
Corporations are more multicellular organisms than cancer. They are capable of achieving far more than a single cell or person, for better or for worse.
I think the person you are responding to is alluding to humans, not corporations.
Only under certain circumstances. It's not inevitable that we be this way. Our most powerful societies cultivate a condition where our economic activity is this way.