Knowledge ownership

Some years ago I've lost track of a great paper about knowledge management. It stated something like:

On the 19th century, Marx and Engels formalized a concept where workers would hold the ownership of the means of production. This concept was communism, and as we all know didn't succeed - at least as Marx and Engels would expect.

On most of the world workers don't have the ownership of the means of production. But there is an exception on most of functional workers on the services sector: they do hold most of the means of production, on the form of knowledge.

When workers from, lets say a consulting company, return home, the company is left dangerously decapitalized until they (hopefully) arive on the next morning. Most of
these companies don't have any asset but manpower. Most of them don't even own the building they work in.

So on this area Marx and Engels idealism is somehow being kept alive. The question is: how should companies ensure that most of the knowledge is kept in the company?

Almost 10 years have past since I've read that paper and the problem (for the companies, not the workers) is the same.

Their are of course companies where the knowledge is kept. But the fact is that in the majority of the companies, the processes and data are controlled by the workers, giving workers a power that companies would like to hold themselves.

Knowledge management is not my main focus today, I no longer work on that area. Now I'm a client. And as a client, I'm feeling the some problems I already felt as supplier: people just don't let go of their source of power. People just don't write what they know about. People just don't describe the processes only they know about it. And here's another citation I heard on a Architects conference a few weeks ago:

80% of the data business needs is kept over workers control. May it be on paper, on their workstations, on their external drives or event on their USB pens.

Makes you think, right? And in a non-political way...

Their is an honorable exception to this problem: the blogosphere. Here people do write down information. Here people don't hold up (most of) their processes, they just share them with the community. This is not Marx and Engels concept, is a broader one. They still have the ownership of their information and opinions, they just share it with others. Maybe companies should look at this model to strengthen their businesses...

[update]
If someone knows the whereabout of this paper please post me a link. Thanks in advance.