Thinking about a healthy economic society.

Does business or the business community need governance beyond the market for its products and services and how it hires people? Some people argue that if people don't like a company as an employer they can leave. If they do not like a company as a supplier of goods and services, they can go elsewhere. In a so-called capitalist society companies are private so why should there be rules made on who they hire, how they produce, and what they produce as markets give the right answers. Do you agree or disagree and lay out your argument clearly.