The experience of Xavier Andre Justo—the former Swiss banker turned whistleblower in one of the most notorious financial scandals of the past decade—shows those who speak up about bribery and corruption are often the only victims of the supposed “victimless crimes” they report.

Justo had been one of the directors of oil company PetroSaudi’s London office. In 2009, the company engaged in a multi-billion-dollar joint venture with Malaysia’s newly setup sovereign wealth fund, 1Malaysia Development Berhad (1MDB), whose aim was to fund infrastructure projects to drive the country’s economic growth.

Neil Hodge is a freelance business journalist and photographer based in Nottingham, United Kingdom. He writes on insurance and risk management, corporate governance, internal audit, compliance, and legal...