Charles Murray and the Three Laws of Social Transfer Programs
Law #1: The Law of Imperfect Selection- Any objective rule that defines eligibility for a social transfer program will irrationally exclude some persons.
Law #2: The Law of Unintended Rewards- Any social transfer increases the net value of being in the condition that prompted the transfer.
Law #3: The Law of Net Harm- The less likely it is that the unwanted behavior will change voluntarily, the more likely it is that a program to induce change will cause net harm.
Charles Murray, Losing Ground; American Social Policy 1950-1980