Some of the larger health schemes in the US cover more population than many a small country. For such schemes, administration is effectively "a government" funded by a tax/levy on members. Why is that sort of government less wasteful or corrupt than any other sort? Actually I'd say that it's probably *more* exposed because of vast salaries and rewards paid legally to executives who create "profit" by shifting $ away from care, which would be a scandal in any first world socialized scheme.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1