Chennai, Jan 19 (ANI): Union Finance Minister Arun Jaitley on Monday (January 19) said that the government will increase public spending on infrastructure in months to come. The government estimates the country needs to spend $800 billion on infrastructure to grow seven percent per annum, sharply higher than around 5.5 percent projected by the Reserve Bank of India for the current fiscal year that ends in March. Addressing Confederation of Indian Industry (CII) summit in India's southern Chennai city, Jaitley said that the public spending on infrastructure would have to increase because the old Purchasing Power Parity (PPP) model was under stress and needed to be revived. Jaitley had promised imminent changes pushing ahead key reforms such as the introduction of a nationwide sales tax.