This is something you'd really want to be sure about. If the cause of said income gap is instead cultural, genetic, or something else altogether (e.g. drug war,

This is something you'd really want to be sure about. If the cause of said income gap is instead cultural, genetic, or something else altogether (e.g. drug war, single motherhood), reparations have the potential to make things far, far worse long term. Shielding people from reality (e.g. cause, effect, self-ownership) for a sufficient period of time is a dangerous game.