It also does not guarantee or even attempt to bring the "right person for the right job". The labor turnover rate in Japan is less than half the US level. The seniority-wage system can also be seen in Japanese government.
The system does not promise or aim to pair the most suitable individual with the most fitting role. Instead, it's notable that Japan has a significantly lower employee turnover rate than the US. This concept can also be observed in the Japanese government's seniority-wage system.