I can tell you why people are scared of corporations. It's because they transcend nation states and hence democracy. They can pick and choose from different jurisdictions for different purposes. Pay taxes here, use good infrastructure there, conform to environmental standards or labor laws in one country whilst exploiting broken political funding rules in another one.
I can't say this is always bad. Sometimes it helps us avoid authoritarian ideas that various governments subject us to. Sometimes it leads to cheaper goods and services for all of us. But it is definitely scary how large entities controlled by a small wealthy minority wield such disproportionate power.
