Why do we have banks? Why do we have stock markets?

Banks take customer deposits in return for paying customers an annual interest payment. ... These loans and business investment are important for enabling economic growth.                                                                                 The stock market serves two very important purposes. The first is to provide capital. It is a measure of a company's liquidity and its ability to meet short-term obligations as well as fund operations of the business. The ideal position is to to companies that they can use to fund and expand their businesses

Explanation:

social contract theory, nearly as old as philosophy itself, is the view that persons' moral and/or political obligations are dependent upon a contract or agreement among them to form the society in which they live

people can see all information on a topic and believe it because of technology