SME's play a part in contributing to the the GDP of all economies. Is that contribution responsive to stimulation in order to improve the rate and volume of contribution; i.e. to move the delta?
I am in agreement that GDP is not the best measure of economic development. Amartya Sen has developed a model of development grounded in the Human Capabilities paradigm. Here development is measured by the expansion of human capability eg prevalence of literacy versus prevalence of book manufacturing. His "Development of Freedom" articulates the approach.