Your competitors take out contract hits against your whistleblower and you need to have bodyguards to protect them.

And then your head of security and the whistleblower fall in love until at the end of the movie the competitor assassin gets into the court waiting room and the head of security throws themselves into the ninja star's way and dies in the whistleblower's arms as the ultimate sacrifice is made for love and corporate profits.

I tear up just thinking about it.

They do have an disincentive, its called decades in jail if its discovered you kill him.

Or, short of that.. If you're whistleblowing on Boeing, you should go to Airbus and Lockheed and tell them, "it's in your best interest that I stay breathing".