> Abstract concepts map very well to objects. The problem of mapping a business domain to computing structures isn't unique to OOP.

Yes, I agree in theory. What I meant to say is that many concepts don't map to physical objects.

> In this case, I'm slightly gobsmacked that no-one pointed out that an employee is not their job. The contract of employment is a separate domain concept.

This is what I mean by flamewars. Your solution sounds good, but there are other people on this same thread still arguing that it makes perfect sense for an employee to fire itself.