This. Government does a lot of stupid stuff, but this isn't one of them. Excepting the situation where employees are expected to buy for others (e.g. entertaining clients), I don't understand why any organization feels the need to kill trees and waste time scrutinizing receipts for travelers' meal expenses. Set a fair per diem, pay it to everyone and be done with it. If the hotel breakfast is inedible, who cares if I spend $10 getting something edible down the road? If I want to make instant ramen in my hotel room coffee pot for 3 meals a day and save the rest towards a BMW, who but my cardiologist cares? And if I want to spend twice the per diem eating at really nice restaurants, it's my money anyway.

Treating your employees like kindergarteners just breeds resentment--especially when you're micromanaging something as personal and as irrelevant to work as people's food choices... and I say this as someone who's the exact opposite of a picky eater.