Agency Packaging Fees: Are They Justified?

What is your opinion on "agency packaging fees?" Producer Gavin Polone thinks they go against the interest of the writer, and work against the quality of the show, where every dollar should be put on screen. (see his article in the Hollywood Reporter, link below...)

For writers, the issue of agents and packaging fees is similar to managers and producer's fees.  The question is always what "extra" is the representation bringing to the project such that they deserve a fee? What do you think? Are packaging fees a scam, or are there some good arguments FOR agency packaging fees?

Television's Dirty Little Secret

Is Your Agent Getting Something For Nothing?