adding metadata, the difference between personal and corporate life

During my vacation I read the book everything is miscellaneous by david weinberger. I think the book is great in describing the third order of order and giving 4 new principles in ordering information. If your interested please read the book, it is excellent. In personal life some people tag a lot and the tools doing so are very good. But in corporate life tagging is not very wide spread. At the moment tagging is one of the best ways to show the miscellaneousness of information. In, lets say, delicious the use of tagging gets clear fast and results are instant. Because tagging and search go hand in hand. In corporate applications this is not the case. Workers mostly hate to add metadata because it is of no use to them and the benefits are unclear (i.e. search is not working properly). Tagging and search have to be synchronised in order for workers to instantly see the benefits. Why do sites like delicious got this working and a document repository not?