Why do the farm labourers earn less than the minimum wages in Palampur

Why do the farm labourers earn less than the minimum wages in Palampur? 

Answer: The minimum wages for a farm labourer set by the government is Rs 60 per day. But the farm labourers earn less than this amount because there is heavy competition for work among the

farm labourers in Palampur. 

So, people agree to work for lower wages.