I think the EU Public sector has too much variance in it to be safely serviced by just one distro. Just thinking on the hifdes of legacy infrastructure that needs to be kept integrated (storage, auth, etc).
I think a better approach would be to have a programme in the EU to allow local administration and PS agencies to establish their own FOSS desktop solutions and base information exchange on truly open standards would go a long way. Couple that with an incentive to utilize small shops for the execution instead of corporations and we might have a chance to emerge from the bug pile of mud that is current Public Sector IT before anybody else in the world.