Toyota Motor Corp.'s union is planning to propose that a larger emphasis is put on performance when determining workers' pay increases, rather than continuing the current system in which seniority is the main criteria, a source close to the matter said Thursday.The Toyota union's policy is widely used as a standard-setter for annual wage negotiations across Japan each spring. The proposed system, reflecting management's wishes, would increase the possibility that larger wage gaps could form between union members at Toyota.The policy change comes as Japan's largest automaker faces a difficul…READ FULL ARTICLE