I think you need to increase your level of cynicism a bit for this one. The entire system is built on a series of back room deals, shady agreements, and quid pro quo bullshit. The only form of currency worth anything in this quiet political war is, ironically, reliability. I need to rely on you to do X fucked up and corrupt thing to benefit me and I in turn will do Y fucked up thing to benefit you.
The problem with Massive Fraud is that... well, your reliability gets shot to shit. Oh, a little bit is fine, its the spice that makes things run. But this scale? How can I rely on you to do X, hell how can i rely on you to do X and not indite ME in the process you hashed this so bad?
The cruel political calculus says that Trump, not Biden, is the safer bet. He is well known to keep his word, knows exactly how to move money and assets quietly, and unlike Biden doesn't have a giant looming cloud of deceit above him.