The shepherd is astonished, because that is exactly right. Man picks one up and begins to walk away. Double or nothing that I can guess your exact occupation. Man says sure. A mathematician, an accountant and an economist apply for the same job.
Economists can supply it on demand.
You can talk about money without every having to make any. Mick Jagger and Arnold Schwarzenegger both studied economics and look how they turned out. When you are in the unemployment line, at least you will know why you are there. Although ethics teaches that virtue is its own reward, in economics we get taught that reward is its own virtue. When you get drunk, you can tell everyone that you are just researching the law of diminishing marginal utility.