It’s interesting that I have never thought that spending office hours for personal tasks as corruption but abusing while spending office resources is indeed a corruption. Sometimes, employees may lookup information such as travel and tour, local news for personal interest, on the other hand, as per traditional company policy, everything we do on the company laptop belongs to the company, so it’s risky if we have personal photos and videos.
I agree that network analysis is useful in uncovering corruption. In banking sector, they use a graph database (a network of transaction from one person to another) to find out fraud. In health sector, I believe that if we check a network of transaction (if digital record), it will be easier to find out.