The new structure of Grade Pay reminds me of the Mughal mansabdari system, which was refined by Akbar to help him administer his unruly empire. Here's what Wikipedia says about it:

"Two grades delineated the mansabdars. Those mansabdars whose rank was one thousand (hazari) or below were called the Amir. Those mansabdars whose rank was above 1000, were called the Amiral Kabir(Great Amir). Some Great Amirs whose rank were above 5000 were also given the title of Amir-al Umara (Amir of Amirs).

A Mansabdar was in the service of the state and was bound to render service when asked. Additionally, they were graded on the number of armed cavalrymen, or sowars, which each had to maintain for service in the imperial army. Thus all mansabdars had a zat, or personal ranking, and a sowar, or a troop ranking. All servants of the empire, whether in the civil or military departments were graded in this system. There were thirty-three grades of mansabdars ranging from 'commanders of 10' to 'commanders of 10,000'. Till the middle of Akbar's reign, the highest rank an ordinary officer could hold was that of a commander of 5000; the more exalted grades between commanders of 7000 and 10,000 were reserved for the royal princes. During the period following the reign of Akbar, the grades were increased up to 20,000 or even more."

They were called Amirs then. Only babus now?