They explicitly don’t. Money and dignity are in no way related. They may, on occasion, study how people will deprive themselves of dignity for money, but of course this is not within a hundred miles of the primary interest of the field. It is essentially macro-psychology. It is trying to remove identification of the individual to find generic patterns.

Economics isn’t just “money”.

Economists study things like stripper names to abortion effects on crime. Go ahead and read the book Freakonomics.

Economics and money are not the same thing. This is why I specifically pointed out that they’re just mediocre psychologists.

Which elements of this book haven't been totally debunked?

Yah I heard about people trying to debunk it over the years, with zero effect.

No, they don't.