Apparently the impacted XP and 2003 machines were accessing the same disk servers as the patient record systems. Thus an infected CAT scanner controller (or whatever) was able to destroy the patient records.

That doesn't tell a story of missing money or maintenance contracts. It tells of poor or even irresponsible and incompetent deployment procedures.

You shouldn't allow your CAT scanner to write over your patient records at a server. You shouldn't even have them in the same network segment.