This is simply the definition I was given in business school. If you type in "purpose of a corporation" on Google, this is what you will get (which is comedically ironic in this situation).

"Efficiently organizing work" is what must be done as a by product or failure is ensured in this survival of the fittest capitalistic system.

I agree that the ethics are not what they should be in the corporate culture today, but that doesn't change the nature nor the purpose and definition of corporation.