Many businessmen have at least one ulcer.
Suppose many of your workers only worked as they felt like it, and yet you must always be very sweet to them, and never fire one of them from the work force. Also, suppose you were in competition with a notorious rascal who has no scruples, and is far cleverer than you are. He tempts your workers away with one thousand and one seemingly glittering attractions. Or he causes division and ill-will among your workers with a resulting loss of effective work being done.