This is patently false. All the UoN pupils I know tell me otherwise
So I guess the UoN student leaders were lying to the media (including international press) when the listed this and a string of other charges against him. They specifically stated that he runs all the shops and kiosks in the university.
I am also surprised but not entirely shocked. I have seen people who run billion (pick your currency) budgets and (by any measure) some of the largest in (pick any) country who were found engaged in some mortifying activity. I know of a guy who was so "honest" he couldn't ask the finance manager to arrange "something" but instead would go shoplifting. He was caught once and some female national staff had to intervene and clear the mess.
So having responsibility over a huge budget or even holding positions where most organizations would "ban" you from entering a supermarket or any shop in the (guaranteed) event you will not be given a bill for whatever you select to buy, is no guarantee against mischief (this is treated a corruption)