When authorities try to suppress malware authors, those criminals simply return to the drawing board and develop something bigger, stronger, and more impenetrable. This is a system that certainly favors the criminal, and security workers are finding it harder and harder to keep the malicious elements at bay.
Enterprise security is vital at any kind of organization, but in few places is the need as readily apparent as banks. After all, the average bank has access to the most privileged information out there — namely, payment data, as well as direct access to customer accounts. That data is gold to hackers.