You're talking past my criticism and haven't addressed the core logic flaw in your argument.

If government is competent enough to build its own software solutions (and these creations would be valuable enough that open sourcing them would create opportunities for startups in the private sector as you've claimed!)...then they are also competent enough to buy the correct software product from a European private company.

If they cannot be trusted to buy the right software for themselves without the process being corrupted, they sure as hell can't be trusted to BUILD that software from the ground up (a much harder task!).