The WG, or wage grade, pay scale used by the U.S. Federal Government is a classification of the blue-collar jobs that fall under the Federal Wage System and are hourly pay positions. These jobs are grouped into categories of similar jobs with a total of 36 groups.
The Federal Wage System helps determine the classification of jobs, the appropriate pay level, the payment plan and which governing authority is responsible for paying the employees. White-collar jobs fall into the category of General Schedule, which denotes jobs with annual salaries. Other pay system categories include the VN (Department of Veteran Affairs Nurses), the ST (scientific and professional positions) and the SV (Transportation Security Administration).