The proposal suggests the tax hike on higher-income earners from fiscal 2025 to secure ¥5 trillion in additional tax revenue by fiscal 2034 to curb the increase of costs associated with social insurance premiums. If implemented, the tax-to-GDP ratio would rise gradually from 29.7% in 2025 to 31.8% in 2040 while the social security burden ratio will only increase from 18.4% to 18.6%. This will lessen the burden on the working population, whose disposable income will increase, and, in turn, boost consumption.