I've never understood this aspect of European culture. What's a manager ? What are staff ? Presuming that the state has formalized definitions for these thin

I've never understood this aspect of European culture. What's a manager ? What are staff ? Presuming that the state has formalized definitions for these things, what is the purpose ? Why is it assumed that someone is, or has, an employer, and why would we pigeonhole people into extremely narrow (and increasingly irrelevant) social roles ?