The EU requires government acquisitions to be publicly announced so that private companies can make offers that the government then must choose from (not freely, mind you, but following some “objective” metrics).
Even though this might sound great to some, it has the downside of promoting commercial services and vendor lock-in up to the point that even if a free and open source alternative exists, it cannot be used unless there also exists some commercial entity behind it that can sell the software and support for it in accordance with the established metrics.
This might be one of the biggest hurdles in the way for Linux adoption, since anyone can claim to do lots of great stuff with SUPERproprietarySOFTWARE^TM^ and then hold critical services, like healthcare mentioned elsewhere, hostage to their failure to deliver on promises and future bad support.