A cart before the horse. Who gets the most profit? The people who finance the project or the people who actually do the project? In a just world, would it be 50/50? Seems skewed... without the builders, there would no buildings.
What is your notion of "fair" and how do you go from there and arrive at that value? I mean, if the people who financed the project didn't invested a penny then the company would not have the means to get people to actually do the project.