Adam smith said that the free market economy is regulated by : C. Self interest and competition
In free market economy, all economic activities that happen purely based on the the amount of supply and demand. Self interest such as what products you desire, how much price you can afford it will affect the amount of demand, and competition between sellers will affect the price and the amount of supply
The Congress´s power implied through the "necessary and proper clause", also known as the "elastic clause" is to pass any legislation relating to the "express powers" granted though the Constitution. Alexander Hamilton was the main supporter of this interpretation.
