Jesus asked Philip about food in order to test him because, John tells us, Jesus already knew what he was going to do. Made me wonder how many times I am clueless when God already knows what we wants to do in my situation. Andrew was the man with the connection to the little peddler with the fish and bread.
In the end, they picked up leftovers so it wouldn't be wasted! Not wasted? They're in the middle of nowhere! Everyone there had eaten their fill. What were they going to do with it?
The people followed Jesus to the wilderness because of his miracles. They followed after this meal because of what he did with the bread. They sought a meal, a handout or a trick, not eternal life. People haven't changed too much.