Doing so would help to ensure orderly payments of ageing-related expenditures, such as health-care costs. In a recent study, it was found that, given a currently low tax-to-GDP ratio, there is significant room to raise taxes without causing major economic distortions in China, Japan and the Republic of Korea (Poesoro, 2015). Recent efforts to increase tax revenues in the subregion include the sales tax increase in Japan in 2014; the Republic of Korea is considering adding another income tax bracket at the top end of the pay scale.