There is a big difference between a chain of trust with multiple people involved and corporate oversight, and a chain of trust that consists of one person who w

There is a big difference between a chain of trust with multiple people involved and corporate oversight, and a chain of trust that consists of one person who wields absolute power. So yeah, there is always a chain of trust, but some are better than others. In the Google case, if one of those 5 people started doing bad things, the others would presumably be able to stop him and undo the damage.