There is ZERO context in those Tweets. Only showing a line item, with a dense description is NOT evidence for fraud. Its like if I were looking at your bank transactions and assuming the worst.
Don't get me wrong. There is certainly fraud and overpayment happening in government operations. But just looking at receipts is not the smoking gun. If anyone suspects fraud, there are a processes. Inspectors Generals are (were) one way to have those payments investigated, DOJ and FBI would be another step. The IGs were fired last week. I wonder why...
Also, this "Ian Miles Cheong" guy is literally a Kremlin operative - really someone worth blocking. So that's important to know about his motivations to sow doubt in US Democracy.