They should really make some sort of incentive to keep these people alive. Like if a whistle blower dies before the verdict of the trial/hearing make it an automatic assumption and multiply the punishment by 3 times (Treble!). Then you would have companies doing everything to not have whistle blowers die, not what we have today.
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.
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".