I worked for the feds for over 30 years. Blacks were hired in large numbers, at mid-level grades. Few of them could actually master any of the jobs they were given. As soon as they got their “time in grade” they were promoted. The higher they moved up, the more white people they needed to straighten out all their mistakes. Once they got high enough in the actual workforce, they were promoted into management to take them out of the actual workflow. In management they could strut around, act like bigshots, and do absolutely nothing.
Having lived in a number of different states and countries, I have found DC to be the most stratified, class oriented society. You can tell exactly where people came from and where they will be when they stop working. You can tell the few people that have jumped from one strata to another, because they try to dress up to their new peers and fail miserably. The number of outrageously ugly suits in DC is shocking to the eyeballs.