https://www.cbo.gov/publication/60580
The Congressional Budget Office tracks authorizations of appropriations that have specified expiration dates and identifies, annually, appropriations that are provided for authorizations that have expired or that will expire by the end of the current fiscal year. For this report, CBO identified 1,264 authorizations of appropriations that expired before the beginning of fiscal year 2024 and 251 authorizations that are set to expire before the end of the fiscal year. CBO also found that $516 billion in appropriations for 2024 was associated with 491 expired authorizations of appropriations.
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This should be an easy place to start. It’s insane to me that the government could put expirations into spending appropriations, and that STILL doesn’t stop the spending. Half a trillion dollars spent on expired authorizations of appropriations? Ridiculous.