Answer:
the adaptation-level phenomenon
Step-by-step explanation:
People have a tendency to judge stimuli relative to prior experience. For example, if a man's current income increases, he feels an initial surge of pleasure. However, as he adapts to that income level, he comes to consider it normal. He then requires something better to feel another surge of happiness. This is known as: the adaptation-level phenomenon
Adaptation-Level Phenomenon is how people adapt quickly to a new situation, until that situation becomes the new normal
.After getting a better income after a while it becomes normal and you are looking for something new and better man generally is insatiable. Our desires only grow bigger once we have adapted and conquered a particular level