According to Say's Law, people

It is an economic rule stating that production is where demand originated. When a person creates a product and that gets sold, the person gets paid. Once he gets paid he can then demand other goods and services by paying. This was developed by Jean-Baptiste Say who believed in free enterprise and was inspired by Adam Smith. He added that value of the products we buy depends on the value of the products we make. So it means you get what you put in.