The more suc­cess­ful an artist is, the more like­ly their work will lat­er be resold at auc­tion for a huge markup — and they receive noth­ing. Should that change? Also: why doesn’t con­tem­po­rary art impact soci­ety the way music and film do? (Part 2 of ​“The Hid­den Side of the Art Market.”)