I'm not quite understanding. I sort of get your points but there are some holes in this story.
So am I to assume this is a chain restaurant(or your private business)? You have a GM who has a base salary(below the 47K limit?, that seems very low). And some some assistant GMs, like front/back of house managers and head cook?(once again all below the 47K minimum?)
Now what are these assistant managers doing that would require them to stay that far past their closing schedule?(start time should be a static number with no variables) Can't you put a timeline on this procedure and if not completed then there could be repercussions or admistrative consequence?
I think it comes down to management, in terms of motivating employees to do the job correctly and in a timetly manner. You cannot have an open ended timeline, people will continue to push that. I understand that a restaurant's closing can be tricky and it's not always an exact science( I was in food service for 20 years) but I scheduled for a specific time each night and we were able to stick fairly close to that timeframe. If they are consistantly staying an hour extra every night rolling napkins or cleaning the floor, new procedures need to be set and unless there is an observable reason this is happening there should be consequences. If they are truely unable to meet the required timeframe then they should either get paid more of have their schedule adjusted.
Also would it not be possible to just restructure their pay? If an assitant manager has a base pay of 30K but is expected to work 50 hours. Can't you just lower the base pay to incoprroate the base salary with added overtime to still come up with the same 30K number? Honestly I have not read the bill to see if there are restrictions. I mean they still want a job, you still want to turn a nice profit, they are still getting paid the same for the same hours?
Maybe I'm missing something here.
BTW as far as insurance, I would shop for a better deal. I know healthcare has gone up but that number is much more than what I have been hearing from local shops.