Let's see
1: Whites are by no definition enslaving Blacks in the US or any other country in the world. I wonder what you'd consider the slave labor in India to be if what we have here is slavery?
2. The government is overwhelmingly White because the population is overwhelmingly White. Blacks are 13% of the population, so there is no surprise to anyone with more than one brain cell that they don't constitute a large proportion of government officials.
3. The "police treatment" of Blacks in America is not nearly hard enough. The Black homicide rate is almost 10x higher than the White homicide rate. For sake of comparison, the Male homicide rate is only 8x higher than the Female homicide rate.
Either which way, no one is desperate to migrate to slummy-dummy Delhi, while Indians and Blacks alike are desperate to hop on the next boat/plane/shanty-craft heading for the USA... probably, like you said, to be slaves.