That's a very specific argument supporting nutshell.
Give any team in baseball five million bucks and there would, hypothetically, be a way to spend it that trumps buying a reliever.
Any team. Ever.
Good GMs sometimes buy relievers, but probably not before exhausting an extensive list of other options. Maybe you run Tampa Bay and you have a few bucks for some weird reason and the off-season is almost over and your manager keeps telling you how much he loves grant balfour, so you just say f*** it and swallow the bitter pill of inefficiency.