He may have thought he was doing well but didnt really stop to think about the impact on others. Shoppers in Aldi are not rich they need the bargains too, if he has taken them then there wont be any. Saying they are lazy and dont want to stock shelves is rather ignorant, does he think there is unlimited supplies 'out back' in fact these days there is very little out back.
Why didnt he approach the Manager in the first place with his intentions so it could be planned?