For me, the privacy impact assessment hits multiple points.
Primarily, it's to ensure we've struck the appropriate balance between the objectives we have to do, for example in the course of an administrative investigation, which is to protect the information and also to follow through on the responsibilities that are conferred upon us by the government with the privacy rights of our employees. As well, it's to make sure we've gone through and done a thorough evaluation to make sure we understand what those implications are, so that we've either put controls in place or we found a way to balance.
Should we need to use a tool that's a bit more invasive than we would like, it's to make sure we've found a balance. For example, that's why we put it in a lab in a secret facility with security-cleared people and very limited access. I can't open the forensics labs, for example. I can't go into it.