Well, it exists to smooth over friction between staff in order to maximize profits.

Sometimes that means telling a middle-manager to stfu. Sometimes it means pulling up a bunch of bullshit to justify a firing "with cause". Sometimes it just means putting down a notice of events in a registry that nobody will ever read, on the off chance it needs to be recalled in an employment lawsuit.

Boy did I learn that the hard way. My hr also was my manager and I discussed too many details of my life during shifts. She moved me to a different store.