White wealth accumulation was aided by government help Black people were denied.

Evidence

In other words, while Black Americans were being systematically, generationally deprived of the ability to build wealth, and while some of them were also being robbed of the little they had managed to gain, white Americans were not only free to earn money and accumulate wealth with exclusive access to the best jobs, best schools, and best credit terms but were also getting substantial government help in doing so. — Nikole Hannah-Jones et al., The 1619 Project, 1361