Ubuntu and open source help the City of Munich save millions
It reminds me http://xkcd.com/934/ for most simple users. What a government officer do at his/her workstation? They probably have every service through web pages, almost nobody builds native programs anymore. And for the most cases LibreOffice is not perfect, but adequate to do simple jobs. So it is very logical to use something free for these tasks, to replace Windows+Office and save money.