Social status and people's judgement

Some people judge others as their status, for instance if the person is a doctor then we should respect him and take him seriously , but if the person is a garbage collector then we can look down on him or her and treat him badly or below standard, but lets consider this if no one wants to collect garbage and the disease spread around because of the undermanaged garbage and wastes, then do we still think that collecting garbage is not important and the garbage collector are unimportant?