"There is nothing around that I have heard of that obligates a company to pass along any windlfall that it takes in."
To state this in your answer regarding your misunderstanding of the free market supports the other poster that pointed out "you have no conception of a free market". The companies competitors will force them to lower the prices, or a new competitor will emerge and do very well in that industry.
maybe you are correct, but since their boards will be under the same shareholder pressure, you can safely bet that they will scheme to keep as much of the found money as they can.