Of those nurses who 'eat their young' and, as a general rule, are also pretty useless at patient interaction and care; it's all a matter of natural-selection and economical diligence.

1. Young: If you can hack the bullies, ignorants, gossip-mongerers, psychopaths in work then you have the stamina for nursing.

2. Patients: If patients are made to not enjoy their hospital stay they are less likely to become ill and hence save the taxpayer/insurance company millions.

... isn't it?