A 16 year old can get emancipation from the court in Florida. Doing so would make it so parents or guardian would no longer have claim over any money earned.
That's the one decent argument for this law; an emancipated 16 year old needs the ability to work a full time job to support themselves as no one else is legally required to do so.
I kinda would have been, but I had a dictionary at home so didn't use the library one much.