Unfortunately, being seduced by those arguments ignores intrusion debt. One day the intrusion debt of poorly-run systems will be claimed by the intruders already inside the enterprise or those who are unleashed like an earthquake. Worse for you and me, the costs of dealing with the disaster are likely to be borne by the security team!
Ultimate, security is an IT problem, not a "security" problem. The faster asset owners realize this and be held responsible for the security of their systems, the less intrusion debt will mount and the greater the chance that enterprise assets will survive digital earthquakes. Cheap IT is ultimately expensive -- more expensive than proper investment in IT in the first place.
Richard, as usual, nails it.
