Quadragesimo Anno §133

¹³³ Strict and watchful moral restraint enforced vigorously by governmental authority could have banished these enormous evils and even forestalled them; this restraint, however, has too often been sadly lacking. For since the seeds of a new form of economy were bursting forth just when the principles of rationalism had been implanted and rooted in many minds, there quickly developed a body of economic teaching far removed from the true moral law, and, as a result, completely free rein was given to human passions.