The whole topic is a lot more complicated. It's rather hard to found a party: 2009 before the parliamentary elections I have been was sometimes at the regular meeting of the at that time new-founded Piratenpartei. Many attendees were paying for the election posters themselves (you can only get aids (Wahlkostenhilfe) when you already got many votes in a previous election - a chicken-and-egg problem) and were (in my opinion) working really hard alongside their regular job.
Also for most parliaments in Germany there is a so-called 5% barrier. That means that if you don't get at least 5% of the votes, you will get no seats in the parliament (except perhaps direct mandates - but for these you need a relative majority of votes in your district, which is even harder - nearly impossible for a new party). The 5% barrier means that you will need a program that attracts many voters.
I know, and it matches my experience. But the user tw04 seems to disagree with more than flimsy reasoning.
> Take a nasty English joke about lawyers and replace "lawyer" by "politician" and you get the whole mentality quite well.
I wish I could find it now, but Sebastian Haffner mentioned this in one of his books... the German tendency to consider politics as something dirty the private person better keep out of, while both despising and admiring those nasty politicians. I think that sarcasm is a form of cowardice. The way I see it, either you're a responsible citizen or you're not, politics is way too important to leave it to professional politicians. But that's neither here nor there.. one thing is sure, if I had a cent for every time an American or right-wing European tells me some nonsense about Germany, I could buy HN a pretty stylesheet.