Gamification for knowledge management database or not?

I wonder if gamification will produce a lot of content only for the purpose of creating content and playing, receiving badges etc. You're all experts for that question, since you are using stack exchange. ;-)

We have a very well appreciated knowledge management (KM) system at work (~7000 colleagues) with presentations, tips of the day, some sort of social networking tool (profieles to find experts etc.) and a database that supports the KM. I am part of the central team providing this and improving wherever we can.

Is it worth to add some gamification? E. g. we could create badges like here on stack exchange etc. This will cost money, time etc. We would like to teach more people (~ 1/3) is reached by now. But we also always need new authors for tips of the day and knowledge agents filling the database.

Thanks for your thoughts and feedback.