At the South East Asian temples I visited, the food was brought enough for everyone to eat, from the most enlightened monk to the hungriest, poorest attendee at the temple, the only discrimination was that the monks were given the honour of eating first, before the lay people, but I never observed the occurrence of the monks eating all the good food and leaving the scraps for the lay people, there was plenty of good food to go around.
I think it important to point out, that like Christian charities, Buddhist temples act as welfare centres for poor and down and out members of the community, anyone is offered food at the temple, and anyone that follows simple rules of politeness can stay at the temple, if they have no place to sleep, not like you get your own room, with attached bathroom, but a place to sleep, none the less.
18 years ago I made one of the most important decisions of my life and entered a local Cambodian Buddhist Temple as a temple boy and, for only 3 weeks, an actual Therevada Buddhist monk. I am not a scholar, great meditator, or authority on Buddhism, but Buddhism is something I love from the Bottom of my heart. It has taught me sobriety, morality, peace, and very importantly that my suffering is optional, and doesn't have to run my life. I hope to give back what little I can to the Buddhist community, sincerely former monk Johnhttp://trickleupeconomictheory.blogspot.com/