I cannot read the hearts of men, but can do the math, and its not good enough or wise to assume in light of the fact that many have already been caught in fraud, and many more are being looked at closer, that humanitary reasons are what motivate some wealthy people into philanthropy, and a good name for good works has to be scrutized given those facts.
I believe in good people, don't get me wrong, but the bad do exist. And for sure the greedy want to look good.