No, I don't think it's dishonest at all. Unless she's asking for more than what is on the receipt, then, as far as the expenses go, it is completely aboveboard and this is not gaming the system.
It may be illegal to use EBT funds to purchase corporate food, but if this was the only option left to the employee, then I don't even see it as much more than a questionable purchase. Again, this employee was assigned to buy food. Food was purchased. A receipt was presented for reimbursement. If the employee used their EBT to get a lower price but is not asking for the original amount, then there's nothing unethical about the situation. If that's not the case, then there might be.
This is very black and white in my mind. Assuming all of the following are true, then it's really no business of Snowy's whether EBT was involved or not:
- the employee was assigned to buy food as a part of their duties
- other expenses are regularly reimbursed
- The amount requested for reimbursement matches the amount spent
That's it. Nothing else really matters here. As long as that last bullet point is true, there is nothing dishonest going on here at all.