You're assuming management competence (ie. that they know what they need). I've seen way too many companies where they have 3 or 4 developers doing work which

You're assuming management competence (ie. that they know what they need). I've seen way too many companies where they have 3 or 4 developers doing work which 1 competent developer could do, but they're unable to hire or retain competent developers due to poor pay. They'd actually save a lot of money by paying better.