Translating from Italian, these are his lines: Only a few biased ideologues could argue that the market made ethics absolutely irrelevant; rather, economics teaches us what can be done by appealing to interests rather than ethics, thus preserving the use of ethics for cases in which they are indispensable.
If we want to save oil, for example, it is useless to appeal to the conscience of citizens, it is enough to increase the price of petrol and diesel; if we want to protect the environment from petty pollution by the public we can only educate citizens to be conscientious.