What the racial wealth gap proves is class mobility in the US is awful. If white privilege was a significant factor since the 1960s, the ratio of whites to blacks in poverty would have changed in favor of whites, yet it's still two-to-one.

Further, under neoliberalism, the wealth gap is growing for everyone.

Last, we do not know how to make racists stop being racist, but we do know how to end poverty in a month: Basic Income, which was King's solution.