They dont really care about us is about the justice system and the government in general.
The song is about his ordeal with the justice system. from lawsuit to lawsuit,
he paid blackmailers and lawyers for nothing more than mere allegations.
And for him the government allowed these things to happen.
That is why he thought that the government dont care about its people.
especially in the african countries (where his roots came from) where people are starving
their government have not done anything to solve their problem.