QOS or more bandwidth

FWIW, I recently heard someone ask the question - "how do you go to your
investors and tell them you need more money for more bandwidth because you
don't want to efficiently manage your existing capacity?"

This is the business case for QoS, IMHO.


  Which costs more, wholesale, raw bitpipes or qualified
  engineering talent to create/police the policies needed
  to maintain QoS?