From encarta
Individuals acting in their own economic self-interest will maximize the economic situation of society as a whole, as if guided by an invisible hand. In a free-market economy the government's function is limited to providing what are known as public goods and performing a regulatory role in certain situations.
This pretty much sums it up. The only time government should step in is when a problem arises and regulation needs to be implemented or enforced. Other than that the government should mind it's own business.
It is not that simple...
For instance, define 'property'.
"I am polluting this land because it is my property and I am making a profit in the free market. Fuck off."
or
"Fuck you. That dog is my property and I am making a profit by being cruel to him. I'll do as I please"
is there no point where the greater good outweighs the individuals right to choose?
Next question is who judges? Shouldn't everyone in town know who is to judge them?