I'm not sure that you can say definitively that some roles are better filled by consultants, but I would say that some projects are better handled by consultants.
Jesse James GarrettQuotes currently Trending
If you have regard to your future happiness, any view of living comfortably with a husband, any hope of preserving your fortunes or restoring them after any disaster, never, ladies, marry a fool. Any husband rather than a fool. With some other husband you may be unhappy, but with a fool you will be miserable.
Daniel Defoe
I have not slept. Between the acting of a dreadful thing. And the first motion, all the interimis. Like a phantasm, or a hideous dream: The Genius and the mortal instruments. Are then in council; and the state of man, Like to a little kingdom, suffer then. The nature of an insurrection.
William Shakespeare