You're talking about millions of dollars, and sometimes even billions, so it's a high incentive. That goes into the risk-reward aspect for a whistle-blower. There are the costs of legal representation even to do the right thing.
Evidence of meeting #72 for Government Operations and Estimates in the 42nd Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was commissioner.
A recording is available from Parliament.