[danielamitay]

In a simplistic sense, the "esteem" and "self-actualization" levels of Maslow's hierarchy of needs: https://en.wikipedia.org/wiki/Maslow%27s_hierarchy_of_needs

[bhaak]

Or in the even more simplistic Herzberg's dual-factor theory: Money is just a hygiene factor.

If you have not enough, it will negatively impact job satisfaction and motivation.

OTOH if you have enough, it doesn't raise job satisfaction or motivation.