As for why buyers pay these outlandish sums, my guess is that they think that owning original works by well-known artists will enhance their own status. If so, that may provide a means to bring about change: a redefinition of status along more ethically grounded lines.
至于买家为何要花这么多钱，我的猜测是他们认为拥有著名艺术家的原创作品能够提高他们自身的地位。果真如此的话，这倒提供了变化的途径：用更合乎道德的方式重新定义地位。