Mormons are expected to tithe, especially wealthy Mormons (which is what makes the Mormon church so wealthy), and I would imagine that most of the 14% of his income given in charity is his Mormon 10%. Church giving counts as a charitable donation.
There’s nothing wrong with this, but it’s simply that this is what he is expected to do or probably even has to do to remain a Mormon in good standing. The 4% over that, considering his income, would have been a nice gift to other charities though!
They are REQUIRED to pay 10% to be temple worthy.