If it's such a vital piece of Dutch infrastructure, why is it in private hands at all?
Because too few IT capable people are willing to work under the government's pay scales; in most cases going private / corporate earns more. So most Dutch IT projects end up with private companies, which also means that, in the case of DigID and the secure / official messaging platform, the hosting party can charge exorbitant rates. Did you know it costs 25 cents to send a message via the Berichtenbox? So when the government does its annual "it's time to fill in your taxes" message, they have to pay millions. Assuming they don't get a bulk deal, anyway.
Apologies in advance for wasting anyone's time with a light hearted tangent. But as I scrolled past your comment I read:
> If it's such a vital piece of infrastructure, why is it in Dutch hands at all?
It was the funniest thing I have misread in a while.
because privatisation
DigiD itself is government-owned, but its infrastructure is managed by Solvinity (a private company). Not really different from the US gov running half its stack on AWS.