Following a successful pilot project, the northern German federal state of Schleswig-Holstein has decided to move from Microsoft Windows and Microsoft Office to Linux and LibreOffice (and other free and open source software) on the 30,000 PCs used in the local government. As reported on the homepage...
I'm not sure it'll even save them money, at least initially. They're likely paying consultants to work out the best approach, they need to retrain staff, and they'd probably go with a distro like RedHat that has vendor support (plus have paid support for LibreOffice too)