This will likely foster a feel of inequality and resentment. We include volunteers in our programs because there is important work to be done. Volunteers are part of the best way to get that important work done. Good volunteer management insures that the important work gets done well. Note that the emphasis is on the work, not the volunteers.
Volunteers are vital, but only insofar as they contribute to the work.
You can let this philosophy guide you not only in what jobs volunteers do but in how you choose and manage volunteers. Staff often needs to come to see you and the volunteers as catalysts for their own hopes and dreams. Your cheerful, comscientious, respectful and business-like attitude will go a long way to creating the same attitude in your staff.