Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances
The system seeks to match pay to an employee's performance on the job I.e. how competently an employee is able to carry out their duties over a specific period. It's designed to enhance motivation. However. objectivity in appraisal poses a challenge.