"In the last three years, I wrote to you several letters regarding the appointment of the Lokpal and Lokayuktas. You did not even reply," Hazare said in a four-page letter. "This shows you are not serious about rooting out corruption."
He added that the apex court had also slammed the Centre for its apathetic attitude towards it and asked how the country would become "corruption free" if the Prime Minister does not act.
"Interestingly, even the states with your party's government have not yet appointed Lokayukta. It clearly shows the difference between your words and actions. Is this not the insult of the President who signed the Lokpal Bill into a law and the apex court?"
On farmers' issues, the activist said many farmers in Tamil Nadu, Rajasthan, Telangana, Maharashtra and other states had been demonstrating over their demands, but the government was not serious.
"You don't have sympathy for the farmers, this has become evident in the past three years. It's sad that you don't care for the farmers the way you do for the industrialists," he told Modi.
Hazare said there was a need to implement the recommendations of the M.S. Swaminathan Commission report that speaks of food security and getting the farmers the right price for the produce.
Demanding that political parties be brought under the Right to Information Act, he said the Supreme court had also called for this.
"For the sake of well-being of farmers and the country, I have decided to begin the demonstration in Delhi," Hazare said.