Yeah, personally, I'm not sure what I would do about billionaires. Praising them definitely rubs me the wrong way and helps entrench systemic issues. But sometimes it's worth dealing with the devil for their power.

I think this article presents a reasonable oversight of Singer's ethics, but goes farther than is warranted.

The author seems to treat the decision as one between giving a lot to charity or working toward systemic change. It's true that charitable giving doesn't do much to solve systemic problems and this is an issue with Singer's work. That being said, giving to charity can be done at the same time as working toward systemic change. We can try to eradicate the disease while also treating the symptoms. Thus, it seems that the author sets up a false dichotomy.