I've worked as a student volunteer for both a main stand and a clone cone stand. Some of the issues that come up are due to how slow some students work, but much of it has nothing to do with having volunteer workers. For each stand, there is at least one trained employee for Levy Restaurants, and then a group of student volunteers. About 90 minutes before the doors open, the students arrive and are shown what to do. For main stands, each of us is assigned a certain task- 3-4 cashiers, popcorn, nachos, pretzels, drinks, and usually the employee runs the meat; to avoid any legal issues the hot dogs/brats HAVE to be cooked to a certain temperature before they can be served. If we switch between meats, popcorn, anything like that, we'd have to put on a different pair of gloves. It doesn't sound like much but that's another 15-30 seconds when your hands are sweaty dealing with latex gloves. We aren't able to skimp out on any sanitation or health concerns, as trivial as they may seem.
We do not set out extra buckets of popcorn waiting to be purchased- there isn't room in the back, and the popcorn is kept semi-warm inside the machine. We DO prepare extra dogs/brats, which are kept in heated drawers by the cashiers.
It's not quite as easy to feed 15k in hilton or 60k in jack trice as it is to staff a little league game. The amount of food eaten, and which variety, is NOT consistent week to week. Additionally, student volunteers do not make any calls about what to cook, and when. We are not trained, nor should we be trained, on how to fix any broken machinery.
Working the Clone Cone stand for the exhibition men's game, BOTH machines broke down during the game. In games years previous, there would be around 10 cookie cups sold throughout the whole game. We went through 14 before tip-off. These get baked the morning before the game. If we run out, we run out.
As for motivation, working concessions is pretty awful work, and if you do any kind of math, our organizations get payed LESS than minimum wage. The workers are NOT getting payed for their time. We don't get payed. Pretty much every customer intrinsically hates us because of the high prices of food. Food companies are not going to reduce their margins of profit off what they sell. If you want to have absolutely great service by folks payed a decent wage, your prices for concessions are going to go even higher than they currently are.