He examined his own behaviour with regard to undertaking parking violations when rushing to work, which involved trading off the expected cost of illegal parking in a convenient spot, which he roughly calculated as the likelihood of getting a parking ticket violation multiplied by the parking fine (assuming non-payment of the fine would be too costly not to pay up) against the benefit in the form of convenience and reaching his class in time.
As I see it, the concept of the social market economy, too, must always remain an open system - open to new ideas and open to new preferences in society. That is precisely one of the practical problems which we are facing in Germany at present.