This story is written with a wonderful naivete. Consultants like BCG exist only to lend credentials and competent temporary labor. The companies who hire these consultants are looking for affirmation and peace of mind -- most of them too mired in bureaucracy or incompetence to draw even the most basic conclusions by themselves.
Still, it's hard to believe that peace of mind is worth paying 5 kids graduated 6 weeks ago in Political Science from Stanford to come give Powerpoints on meaningless, vapid crapola billed to you each at $300/hr, even where such figures don't make much of a blip on the bottom line.
In companies there are people who are paid to decide things. They also have budgets. Often they are called managers. There are consequences with decisions.
Managers learned a trick: Give the money of your budgets to consultants to make the decision your company pays you for.
If the decision was a good one: The manager was the one who hired the consultants!
If the decision was a bad one: Who could blame the manager, even the top consultants of BCG/Berger/McKinsey couldn't make the right decision, he hired the best!
Either way: The manager outsourced the work he was supposed to do but still gets paid and freed himself from the consequences. Heaven!