vortsa,
Yes, Keg is absolutely correct. Crew can purchase beer or wine from what stock remains at the end of a sector. There is indeed a limit on cans/bottles per person. It is approved at Corporate level and is fully documented.
I emphasise this because your post can be read as if you are alleging theft. That is very definitely not the case. Your post smacks of the "tall poppy", "I-can't-have-it-so-why-should-they?", "divide-conquer" attitude that pervades QF. Worse, if you or your colleagues don't know these facts, it can result in a crew-member having to do a "please-explain" to his boss because some ground-staffer has decided to say something to someone.....
Mate, get your facts straight before you start casting aspersions or writing loose statements here on PPrune.