If the government audited the company's tax records and disagreed that the fiber bars should've been expensed, they'd most likely charge tax, interest, and a penalty proportional to the $5 cost. Fraud requires intentional wrongdoing; no court or auditor is going to find that a company intentionally schemed to defraud the government of a couple dollars by sneaking fiber bars into a travel expense report.
The problem is that 25% lower risk of all-cause mortality is too big to be explained solely by the vaccine. The reduction is similar when excluding deaths due to COVID-19, and is probably driven by people who got the vaccine being different in some ways that the observational study isn’t controlling for.