both Congress and the White House have continued to appropriate and pay government officials, bureaucrats, and government contractors who plug in dollar amount under the category “unsupported adjustment.” An “unsupported adjustment” is a plug figure for cash and assets that are unaccounted for and/or disbursed with no supporting records or audit trail.
Black budget

A black budget is a budget that is secretly collected from the overall income of a nation; the budget is kept secret for national security reasons. Bottom line: we may never know exactly how much is spent or how much is missing from a black budget.
Dude, Where’s my $2.3 Trillion (1999)