Corresponding numbers for Japan, Poland, Australia and Mexico have not been tallied but with the exception of Mexico and one or two countries, most OECD members probably have higher tax burdens. 

In 2014, the average for the 35 members stood at 25.1 percent.

Countries like Denmark had numbers reaching 49.5 percent, with Sweden and Finland reporting numbers in the 30 percent range. The United States had a tax ratio of 19.7 percent, with the figures for Japan and Germany hitting 19.3 percent and 22.3 percent, respectively.

The relatively "low" numbers for South Korea can make it possible for policymakers to mark up taxes, especially since the rapidly aging population will require greater outlays in social welfare.

Despite such calls there are those who emphasize that raising taxes must be done in a careful manner.

Korea Institute of Public Finance senior fellow Kim Hag-Soo said there is some leeway to raise value added taxes but taking such a move may not be easy.

"It remains to be seen whether a government will take charge and push for such a step," he said. (Yonhap)