In the "article", he links to another post, an interview, in which he expounds his views on charities. He thinks they are largely useless - that their purpose is mainly to make the givers feel good, and to give them a tax break. Furthermore, he thinks that charities tend to transfer wealth from the hands of those who deserve it, into the hands of those who don't. He refers to Bill Gates and Warren Buffett as idiot savants, who should spend their time continuing to create wealth, instead of giving it away to the (in his opinion) undeserving.
I won't link it here. I'll let you find it if you really want. There is a little more nuance to his views in the articles/posts, but not much more. I find his views morally repugnant.