1. There is meaningful fraud or waste to cut out.
2. That the goal-post won’t be moved, to squeeze more savings.
3. That the methods that lead to inefficiencies aren’t being repeated.
4. That redundancies are a “waste”. Just in time supply chains are terrible in a disaster, for example.
And everything I’ve seen in the past 50 years and especially in the past month strongly indicate more long-term inefficiencies.
But the TLDR, and I think our generation learned this lesson and maybe it needs to be learned again...? these austerity waves don't actually work. They don't produce better governance and they're actually generally ineffective at reigning in the budget, because there's just a base cost to actually doing things in government that doesn't go away, and the best way to reign in budgetary deficits is to improve the revenue side. The massive inefficiency assumptions are mostly right-wing fantasy and there's just a lot that government actually has to do to keep mass society running.
So, very many government services were and still are at more local government levels.
Still, there are things ripe for privatization, such as commercial rockets, as another poster pointed out.
Then there are complete failures like privatized state and local prisons which are nonsense—what does it even mean to have a competitive market for prisons?—or our monopoly-by-design internet services held hostage by the large ISPs.
These should be largely government run.
But then the monstrosity of US healthcare is a design-by-committee. A pure private system with regulation AND mandated 100% price transparency of services; OR a Japanese/South Korean style national healthcare would still be better than what we have today.
It’s hard for me to give a cohesive answer because it’s such a mixed bag.
Community service as a motivation is actually extremely strong, but becoming more and more invisible in public discourse. With expected results. Which is strange from a nation that is constantly proclaiming its "Christian" foundations?
I have many friends (and a spouse!) who take lower compensation packages so they can work in non-profit or government or other areas where they personally feel they are obtaining some meaning.
I can assure you they work damn hard without fear of "competition."
(EDIT: There are frankly other presuppositions about the nature of private vs public funding and what taxation means/is, but they end up in pointless controversial discussions or downvote fests that I have no interest in getting into this morning...)