Consider for example that when Amazon bought the Ring security camera system, it had a “god mode” that allowed executives and a team in Ukraine unlimited access to all camera data. It wasn’t just a consumer product for home users, it was a mass surveillance product for the business owners:
https://theintercept.com/2019/01/10/amazon-ring-security-cam...
The EFF has more information on other privacy issues with that system:
https://www.eff.org/deeplinks/2019/08/amazons-ring-perfect-s...
These big companies and their executives want power. Withholding huge financial gain from ex employees to maintain their silence is one way of retaining that power.