The Bones of an Organization

I have no idea where this came from, so I have no idea who to give the credit to. I really enjoyed it though.

"The body of almost any organization has four kinds of bones:
1. The WISHBONES who spend all their time wishing someone else would do the work.
2. The JAWBONES who do all the talking but little else.
3. The KNUCKLEBONES who knock everything that everyone tries to do.
4. The BACKBONES who get under the load and do all the work.
ANYONE WILLING TO BE A BACKBONE? Lets hear from you."