the Food and Drug Administration and the Federal Trade Commission
Yes, because one system would have to much power and be able to have full control and do whatever they want. This would lead to corruption and tyranny.
It would be an experimentation, which was done using the scientific methods. This way of thinking is called the positivist way of though where the way one could find the truth of a certain phenomenon could be in experimentation. This experiment should be repeatable, and could be disapproved or approved using the same methods.
