do your own homework

The Netherlands in 2006 officially declared a policy (Nederland Open in Verbinding, Ministry of Economic Affairs) that open source software and open standards are mandatory unless there are strong specific reason to not adhere (comply or explain).

In practise this policy has been disgustingly well frustrated by the incumbent closed source providers. Also at that time a (good) architecture was published for all governmental bodies (public sector) and an ICT organisation was instituted that centralised much of the work and knowledge (Logius, formally known as GBO). Not long after this, Microsoft got an arguably non-compliant order for initially 50.000 desktops (misnamed Desktop Goud, gold). From there on things seem to have become only worse, e.g. in terms of vector lock-in.

Strange as it may seem, organisations like Logius have, or should have, the required resources to assemble and maintain the software stacks needed by governmental organisations, based on FOSS, mostly anyway. Countries like France have already invested more on such stacks and with more cooperation within the EU good progress should be possible. Most certainly if the prevalent IT culture changes, be it for geopolical reasons.