It takes energy to make wax and sugar would provide that energy. If energy were the limiting factor, a higher sugar concentration should increase wax production.
But the amount of energy available is probably not the limiting factor. Also, energy is available from any nectar that they gather so that would further confound your study. I suspect you would need a much better controlled experiment to tell anything.
There are plenty of people who will tell you that if there is a flow on, there is no need to feed.
Linux - World domination through world cooperation