Defending the Centre's decision to demonetise Rs 500 and Rs 1,000 notes, union Home Minister Rajnath Singh said in Haryana town of Rewari on Wednesday that the move will bring "pavitrata" (purity) in politics in the country."This (demonetisation) could pose problem before the people for some time, maybe for a month, but it will be helpful in bringing pavitrata (purity) in politics," Ranjnath Singh said while addressing a 'Shaheed Samman Rally' in Rewari, 90 km from New Delhi."The gap of economic disparity should minimise, for which the government has demonetised Rs 500 and Rs 1,000 notes. If any political party collected donations, it should also be accounted for," he said."We are here to provide the type of governance that the people want. There will be no place for corruption. The government is working on it and this will have effect in the working of government machinery, they will also refrain from adopting corrupt practices," he said."You had voted the Bharatiya Janata Party to power not only to form a government but also to change the system. Our government has taken a number of steps in this direction," the minister said.He paid homage to martyrs of the freedom struggle who laid their lives to secure independence for the country.Rajnath Singh also announced that units of the Rapid Action Force (RAF) would be stationed in Haryana's Mewat district to maintain communal harmony.