Consider that Fannie and Freddie were allowed not to provide detailed financials to congress for several years in a row preceding the 2008 housing collapse. It's not a matter of "oh wow, a major government fudges numbers", it's "how many major ways in which my government fudges numbers might I not be aware of?"
Source?
I’m searching and can’t find one. I also remember reading Fannie & Freddie prospectuses from that time. Each contained extensive financial disclosures.