also, in some countries having HR above a very small size (25 people or so) is a requirement because of the addition of work councils. workers have legal repre

also, in some countries having HR above a very small size (25 people or so) is a requirement because of the addition of work councils. workers have legal representation with the company above a certain size, and HR is required as a counter party for a lot of the stuff worker councils co-decide on.