Budget is what they ask Congress to put in spending bill which is signed into law. Then funds are appropriated. Then funds are spent. Pentagon spending audit is overdue by a couple decades. https://text.npr.org/997961646
Donald Rumsfeld gave a speech and pledged to get to the bottom of the missing $2.3T. He even created office space just for that effort and put everything there so the bookkeepers could get the job done. Guess where the Pentagon was hit the very next day? https://www.cbsnews.com/news/the-war-on-waste/#app
Do you have a source for that? The article you linked does not promote this thinly-veiled conspiracy theory.
Here is a link to the satelite agency having enough funds in a secret slush fund that they avoided the budget process and simply bought land and built a top-dollar building. No accountability in early 1990s! https://www.washingtonpost.com/archive/politics/1994/08/10/b...
A few years ago the Admiral who was Chairman of the Joint Chiefs shocked me by publicly throwing out the number (if I remember correctly) of $7 trillion that the DoD couldn’t account for. That would buy a lot of lunches for hungry children in our country. Anyway I was shocked by his admission, although I think his estimate is too low.
What our country needs is more patriotic people like that Admiral who at least occasionally inform the public.
In the US, it's as if there's an informal agreement that secrecy, like copyright, may obtain for up to a typical human lifespan. If you buy into Plato's concept of the 'noble lie', that governments must deceive their populace to some extent for their own good, then it's sort of inevitable that there would be a tacit agreement to let sleeping dogs lie until everyone involved is dead. The benefit is social harmony (not least because disagreement is an easy way to identify malcontents), the cost is an erosion of institutional trust.
* https://www.npr.org/2011/04/20/135578901/cia-declassifies-it...
That tradeoff was sustainable for a long time; fans of secret history, the paranormal etc., always knew the government had a lot of secrets, but the scope was somewhat steady and comprehensible (atomic secrets will get you executed, other things can be discreetly admitted to after they become obsolete). I think three factors have upended that: the lurch toward a security state after 9/11, the rapid speed of information transmission (and diminishing half-life of utility) as society has become more networked, and economic inflation (which is to an extent a factor of the other two). I include the last because paranoia seems to correlate with inflationary anxiety because it functions as a hidden variable that throws off estimates of supply and demand, and that in turn means strategic considerations move from policy choices towards other means.
Security considerations expand in inverse proportion to institutional confidence, and where social consensus is lacking this can have a runaway feedback effect. Hence the proliferation of hybrid war information operations that are designed to leverage normal skepticism/cynicism into anxiety and paranoia. Educational and economic asymmetries across a polity are like a gap into which wedges can be driven, because more effort must be put into reducing the asymmetry than refuting the IO directly and this is perceived intuitively if not rationally.
A simple example is the idea that the moon landings are fake, often tied to flat-earth or nuclear weapons denial. Space literate people rightly point out the existence of laser reflectors on the lunar surface and their accessibility by booking telescope time, but those alleging its fake can easily spread confusion around this. NASA wants to do original science and avoid disturbing the landing sites, which is understandable; but the upshot is that nobody under the age of about 50 has ever seen live footage from the moon, and so 'debunking the fake footage' is more viscerally exciting to the uninformed or uneducated viewer than gathering the abstract knowledge required to evaluate such claims.
There are even government sites with fun visualizations you can explore: https://datalab.usaspending.gov/americas-finance-guide/