Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Took a whole book to say "don't spend any money and look for bargains when you do."

Having money is not an end, it's a means to an end. Yes, you can collect more and more money by not spending any, and it's certainly a good idea to avoid borrowing money that you're charged interest for, but the point of having money is not merely to *have* money...it's to be able to *spend* (and yes, sometimes *enjoy*) the money you have.