Michael J. answered 02/17/17
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Effective High School STEM Tutor & CUNY Math Peer Leader
In a free market economy, the marketer makes his/her selling policies, such as refunds and return policies. They can even set their own prices for the merchandise they sell. Sometimes, the policies they establish can be dishonest and used to rip people off. If a business has a "no refund" policy, you probably would not want to shop their because their products are probably lacking in quality. So yes, the incentives of the free market does promote greed. That is why business are regulated by certain bureaus, to protect the customers from being ripped off and getting less bank for their buck.
If banks were not regulated, then they can charge you extra fees for small transactions. Or authorize a payment without your knowledge.