(a) He is trying to say that the law is one-sided, only favouring the rich farmers, who have taken over the commons.
A poor man can be hanged for stealing one sheep, whereas the rich landlords have taken over the common land in which the poor were earlier grazing their large numbers of sheep. The rich farmers were not being penalised for taking over the commons, although they deprived the poor men’s sheep of fodder. He was protesting against the unjust laws.
(b) From the above passage I have learnt, that inequality is always unfortunate for the poor and ordinary people. Society has a tendency to protect the rich. But everyone should be treated equally.