I agree entirely with the previous post. What one could add is the fact, that some companies e.g. LTU are indeed providing some sort of pension scheme. In this case the company contributions will increase the tax percentage you pay on your monthly salary (geldwerter Vorteil). Upon retirement you expect to reap the harvest... and surprise, surprise, you are double taxed on it! There are many other examples like that. When you're pumping gas you pay the V.A.T. on top of the fuel tax which the state has already imposed on it.
remember there is an agreement also that no LTU pilots are allowed to join AB now (direct entry command)!
@ YP321: It is typically german, that you get to know these things only in a forum like this and not by other means. Thank you for the info.