Money in itself doesn’t satisfy a basic need for survival, like food, water, shelter, and sex. Money is just paper, after all; it’s what money represents to us that has value. Money is therefore called a “second reinforcer” because, while it can be used to purchase a “primary” reward (food, water), it isn’t a primary reward in and of itself.
…Money becomes more or less powerful based on your view of it and how you elect to use it. - “Train Your Brain To Get Rich”