"Have you ever left just a few minutes before 5"

There's a story I was once told about how someone worked really late and then they came in late the next morning, but a VP happened to notice and they got in trouble despite having worked overtime.

I'm in favor of not being a "greedy jerk", but you have to do it for yourself. If you think you will be rewarded, that is delusional, and really just another type of greed.