Prejudice against manual labour

Here in the Provincial house there has always been a sort of silent war being waged among the staff members. It is basically on the differentiation made on the basis of work and pay. Those who do the house-cleaning feel that they have to do the most amount of work, all round the clock, while those at the desk have barely any back-bending job to do and yet take home a fatter pay cheque than themselves. In a sense it is true. Those who do sit comfortably in offices or at desks and never ever sweat, earn much more the those who slog it out in the sun or do the most amount of physical work. Some say 'it has to be so'. Or is it that it has been made so?