Government officials don't give a fuck about it. At all.
No one beside themselves has the power to declare any of their spendings as illegal. So they could, for example, declare they spent $190 dollars on burger and fries for one person, and nobody can do anything about it.
Operation Serenata may tweet about it. Some people will read that and complain on twitter, and life goes on.
Our current unelected president was recorded talking about killing people to stay in power, and nothing happened. People in high-paying government jobs are tricking the system to get paid twice and nothing happens. Politicians can vote on their own pay raise, which they do many times per year, and nothing happens.
None of these big things have consequences, so something as small as someone spending a bit more on lunch is so irrelevant that they don't even care to try and hide it.