Nick, you do realize that the scenario painted in this article was based on farfetched speculation designed to create a scary headline?  Assuming that the business engages in tax planning, you can be sure that this scenario would not occur once the new rules came into force.
With regard to reserves, you can be confident that whatever new legislation is passed will still allow businesses to hold capital.  The question is how much makes sense and when does the actual business become secondary to profits earned through passive investment?