It is the hope of the politician, and almost full employment is the hope of the businessman and industrialist. It is also a desirable social condition from the viewpoint of the moralist. Furthermore, full employment is in agreement with the social objectives of the engineer, but not in the same sense as for the other three. The politician in office wants full employment for his constituents.
Full employment means that they are all getting an income and are thus able to pay taxes.
It also keeps them out of mischief, especially the kind of mischief that leads to social change or even to a change of political administrators. Employment stabilizes people in an area so they do not move around and learn as much about what is going on elsewhere. There is nothing like full employment to tranquilize the people, and a placid population is highly desirable to the politician. The businessman wants full employment, but not quite. But the businessman wants just enough unemployment so that he can be choosy about the employees he selects for his business.