I had to take a break to do my taxes last week.  For what its worth, it might be interesting to know that when this book was published, people did not have to file income taxes in the United States. 

There were other forms of taxes, but not income taxes.  I suspect that there may be a correlation to the introduction of income taxes and obesity and heart problems in the US.  I doubt anyone will ever be able to fulfil a research project on that to prove it right or wrong any more than they might show that children that drive RC cars recklessly grow up to drive real cars recklessly, but it is an interesting historical perspective.