Groomsmen Are Not Employees
Other than the best man, most groomsmen don’t usually have too many responsibilities during the wedding, but that was not the case in this story, in which the groomsmen were forced to work after the ceremony was over. And not, they didn’t got any compensation for it!
If it was an open bar, I don’t expect that the groomsmen would be the best people for the cleanup job. However, I also do not expect a bride and her mother to yell at the groomsmen to continue working as if they were paid to do so. At least this person decided to completely cut ties with the couple.