 As a longtime critic of the Bank of Japan's monetary tightening policies in the Diet, he chaired multiple study groups on monetary policy when the LDP was out of power, and appealed to Shinzo Abe the need for quantitative easing.Yamamoto proposed the consumption tax increase of April 2014 to Abe Shinzo, and advised swift action.He also advocated for basic allowances and various public-works projects for low-income earners (among other economic policies) through a revised budget that matched the tax increase.