I would like to add that (and not since I come from law background) today the HR can be mostly automated for a lot of stuff as other said in this thread. Some processes such as personality tests can be outsourced to outside psychologist. I always like to add that having with knows ins and outs of business and legal, is far more beneficial for business. To be fair everyone will always calculate costs & benefits of each position, and at this point, HR as it is now is large expense.