The government doesn't report it because obviously, and the media doesn't because it's much better for ratings if you have sound bites and intense (not-at-all setup) debates between people who disagree, and so on. A milling "X amount of dollars" and then speculating and where it could be, and asking for a probe or some shit - only for the probe to come out and say "Blah blah blah, nothing to see here" - doesn't keep viewers gripped. That's where we are now, Yellow Journalism.
EDIT: Fixed a sentence.
The government doesn't report it because obviously, and the media doesn't because it's much better for ratings if you have sound bites and intense (not-at-all setup) debates between people who disagree, and so on. A milling "X amount of dollars" and then speculating and where it could be, and asking for a probe or some shit - only for the probe to come out and say "Blah blah blah, nothing to see here" - doesn't keep viewers gripped. That's where we are now, [Yellow Journalism](https://en.wikipedia.org/wiki/Yellow_journalism).
EDIT: Fixed a sentence.
There was 2.3 Trillion missing from the pentagons budget last year. I don't believe most of that the government/media reports.