knowledge sharing motivation

Organic KM: Value Alignment & KM
Dinesh mentioned that Organizations that succeed in value alignment can be benefit from this. In fact, value alignment is part of company culture. Of course, it will act important roles in encourging knowledge sharing. But this haven't touch the deepest point of knowlege sharing. The key is how employee can benefit from sharing their knowledge and experience.
I most situation, only company get the benefit, but the guys who contribute can only get a little even nothing.