> Corporations have rarely (if ever) been meant to further public good. They have almost always been for "unrestrained pursuit of profit to the exclusion of all other concerns".

That's wrong. Corporations don't have an independent existence; they're legal entities created by law. The laws that allow for corporations were not written to better allow for the "unrestrained pursuit of profit to the exclusion of all other concerns," they were written because corporate legal entities were judged to be beneficial to the common good of the home country.

What they're meant to do is distinct from what will naturally do when their behavior is unchecked.

I think it's somewhat analogous to patents, which are rights created by law for the express purpose of incentivizing invention and encourage eventual public domain use.