My boss comes to work hung over all the time...?

I work for a franchise pizza restaurant. It is owned by a very rich man who has no real dealings with the day to day operation. He has a supervisor who is in charge of running these issues. The supervisor oversees the store managers but is only in the store for a few minutes each week. My store manager does not deserve the position. Hr comes into work Hung over or drunk, he never works the times he is scheduled, he sleeps in the back, allows his friends in the store for extended periods if time, gives away tons of free food, talks to his employees in inappropriate and often sexual ways, and is all around lazy. How do we make this known without it looking like a mutiny or risking our job? All employees feel the same.