I think the author's point isn't that getting money is good, but that people get money in exchange for good. Therefore, if you are receiving money, it is due to

I think the author's point isn't that getting money is good, but that people get money in exchange for good. Therefore, if you are receiving money, it is due to some good action you've done. If you are spending money, you are not creating good for the other person, but compensating that person for the good that they've done. (I do not fully agree with the author's point AIUI.)