At a brick kiln the labourers do the heaviest work all day, yet they earn the least

Why

Jayesh is holding on to a sense of fairness that is worth keeping, and his description of the work is accurate — the labourers do carry the heaviest load. What he has done is turn 'ought' into 'is'. What a person earns is settled by bargaining power, not by effort: how many others can do the same work, whether the worker owns any of the land, kiln or money involved, and whether they can afford to walk away. Heavy work that many people can do, done by someone who cannot refuse it, commands a low price however hard it is. Notice this is a description, not a defence — seeing the mechanism clearly is what lets anyone argue for minimum wages or a union. Test: ask why a skill few people have is paid more even when it is physically easy. Sheela is right: earnings are set by bargaining power, not effort — and Jayesh's sense that this is unjust is a fair one; the two can both be true at once.