The metaphor doesn't work. You wouldn't dangle a steak dinner as a reward to a group of people who you could reasonably assume were mostly vegan. The intended reward _is_ the steak, because steak is expensive and delicious when prepared well. Yes, you could order a nice salad, but don't you think it sort of misses the point? It's not on the employee to enjoy the reward they're being offered, it's on the management to pick a reward that's valued by the employee. And sometimes, that means having even a tiny bit of cultural sensitivity.