Antibiotic use has an immediate return and the externalities are pushed on to society.<p>In context of the large scale structure of society, one that promotes large scale exploitation for the benefit of an individual, it makes sense to profit now and let others take care of the costs accrued by your actions.<p>There is no clear economic disincentive to steer people away from making this decision despite the negative outcome it will eventually have for everyone including the individual.