The economic goal of any nation, as of any individual, is to get the greatest results with the least effort. The whole economic progress of mankind has consisted in getting more production with the same labor. It is for this reason that men began putting burdens on the backs of mules instead of on their own; that they went on to invent the wheel and the wagon, the railroad and the motor truck. It is for this reason that men used their ingenuity to develop 100,000 labor-saving inventions.