Milton Friedman spoke to this point.
In conjunction with free markets you have to have rule of law. Rule of includes strong protection of private property and protection against fraud. You will be surprised how an expansive view of fraud will curb quick and easy illegitimate profits.
What about environmental protection, as an example. I'll set up a chemical company, I'll save a huge amount by not using any filters and just releasing the leftover sludge into the lakes and groundwater. It won't affect me because I will live in another region or a different country.
We are already discussing regulation...