[T]he sums that the Metropolitan Museum of Art and MoMA have spent and are planning to spend on their extensions and renovations would have done more good if they had been used to restore or preserve the sight of people too poor to pay for such treatment themselves. I am not suggesting that these museums should have done that. They were set up for a different purpose, and to use their funds to help the global poor would presumably be a breach of their founding deeds or statutory obligations, and would invite litigation from past donors who could perceive it as a violation of the purposes for which they had donated. (Perhaps, though, the museums could justify, as part of their mission, restoring sight in people who would then be able to visit and appreciate the art they display?)

Peter Singer, The Most Good You Can Do: How Effective Altruism Is Changing Ideas about Living Ethically, New Haven, 2015, chap. 11