People in some countries can't form neat, orderly lines

Though seemingly chaotic and unnecessary to those of us in the "West", the truth might be that these "mobs" actually work. Their structure-- or lack of it-- rewards those who want the ticket or item the most, and only displeases those who weren't industrious (or ruthless) enough to work their way up to the front. This is a form of price discrimination in which those who were willing to "pay" the most, in this case with time and effort, are rewarded, while those who weren't, aren't.