To what degree (if any) should the government interfere in the operations of the free market?

To what degree (if any) should the government interfere in the operations of the free market? 

(NOTE- In the structure of the essay, it is very important that you have a clear introduction that sets out what argument you are making and how you intend to make and support it. The body will consist of points in support of your position. The conclusion restates the arguments and offers some observations based on your research)