I recently read a book called "Slicing Pie" that dealt with this very subject. Your end of year meeting is part of it, but also there needs to be a concrete way to value actual work. Unfortunately, that means time sheets for people putting in sweat equity. There needs to be a collection jar for the sweat.
There is only one right answer to this question: a founder should only keep what she deserves to keep--no more and no less. If she has more than she deserves the other participants will be demotivated. If she has less than they deserve she will be demotivated.Contrary to conventional