"Those with wear will continue wearing down their teeth and ... if you keep grinding at this rate, you won't have any teeth, " she said.

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De Klerk cites high unemployment as a grinding problem, with a rate of 50 percent among blacks between ages 18 and 34.

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Philadelphia Fed President Plosser does not seem to think so and believes that the Fed may need to raise interest rates sooner than 2015 if the economy starts to grow at a faster rate than the grinding pace that the Fed is currently forecasting.

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Mr Koizumi's last months coincide with accelerating economic growth and a definitive end to seven years of grinding deflation in November core prices rose by 0.1%, and a positive core inflation rate for December is also expected to be announced on January 27th.

ECONOMIST: There's still no alternative to the Koizumi doctrine