You are pushing your cart to the checkout at the grocery store and see ahead of you in line a man with his small son. The man is unloading his cart onto the conveyor and his son, maybe two or three years old, is sitting in the child seat. Suddenly the boy notices the candy along the side of the lane, lets out a scream and starts reaching. His father is distracted with the groceries and embarrassed and tries shushing the kid. Well, that just leads to more screaming and reaching. The father is at wits end, trying to get control of two demands on his attention, the groceries and his son, while glancing around with an apologetic look to you and everyone in earshot, which by this time is about half the store. Finally, he relents and hands the child a candy bar so that he can pay for his groceries and get out of there.
What you are probably thinking at this time is: “Quiet, at last!” but also “That father is in for a real challenge because he has just reinforced a negative behavior." He rewarded the screaming and fussing and can surely expect more of the same in the future.” You are also hoping you do not end up in the store at the same time as this family in the future. Don’t feel guilty. That’s exactly how most people would feel. Any right-thinking adult with an iota of life experience knows that for children, as well as for adults, behavior rewarded is behavior repeated. Behavior discouraged is behavior modified.
Now let’s look at the problem that some people refer to as illegal immigration. People sneak into the United States. They get free public education for their children. They are given jobs by employers who look the other way, just grateful to be able to get someone to do the work “that Americans refuse to do.” They get free medical care at emergency rooms. If that medical care is the delivery of a baby, their new family member automatically becomes an American citizen eligible for government benefits. Some people who want to discourage this behavior think that the answer is to build a wall or a fence instead of recognizing what we all know: behavior rewarded is behavior repeated. Others think that the solution is to confer citizenship on those who have gotten away with it for a given number of years instead of recognizing what we all know: behavior rewarded is behavior repeated.