For a man of his wealth, failure to give charitably is a grave sin of omission.
Matthew 25
34 "Then the King will say to those on his right, 'Come, you who are blessed by my Father; take your inheritance, the kingdom prepared for you since the creation of the world.
35 For I was hungry and you gave me something to eat, I was thirsty and you gave me something to drink, I was a stranger and you invited me in,
36 I needed clothes and you clothed me, I was sick and you looked after me, I was in prison and you came to visit me.'
37 "Then the righteous will answer him, 'Lord, when did we see you hungry and feed you, or thirsty and give you something to drink? 38When did we see you a stranger and invite you in, or needing clothes and clothe you?
39 When did we see you sick or in prison and go to visit you?'
40 "The King will reply, 'I tell you the truth, whatever you did for one of the least of these brothers of mine, you did for me.'Matthew 7:17
Likewise every good tree bears good fruit, but a bad tree bears bad fruit.
Matthew 3:10
The ax is already at the root of the trees, and every tree that does not produce good fruit will be cut down and thrown into the fire.
I was watching a great episode of Bishop Fulton Sheen's old TV series, "Life is Worth Living" this past weekend. He did a wonderful job of analyzing the morality of various economic systems. The portion relevant to this issue is the following. He said, "once a man has enough wealth to secure the well-being of his family (their needs, not wants) immediately and reasonably into the future, the rest of his wealth does not belong to him." It's a point that's hard to dispute.