I think marriage is a good way.  And I believe education works too. I have seen many people address racial prejudice with the trappings of economic success. People also like to be around others who have similar income, drive a similar car (used to be Volvos for liberal boomers), similar neighborhoods, nice clothes, etc. Here is a quote: "Whites 
are significantly more likely to receive wealth transfers than are African Americans" http://www.pewtrusts.org/~/media/legacy/uploadedfiles/wwwpewtrustsorg/reports/economic_mobility/pewempchartbook12pdf.pdf

Sanders believes a college education paid by a tax on Wall Street speculation will empower that young student to do well to get into college. Imagine if kids believed anyone who gets decent grades goes to college. As long as privileged White people have an educational advantage that turns into an economic advantage, they will continue to believe it is all because of hard work.  They don't want to believe it is partly white privileged.