If you had millions and billions of dollars, what would you spend it on? Lots of rich people like to spend money on getting things to go their way - whether its giving money to help elect the politicians who will make laws so they pay less in taxes or so their companies are subject to less restriction or whatever. They choose the activism route. Also rich people spend money to make their lives easier - the fancy car, the nice houses, the fancy vacations all over the world.
How much money do they give to charity? Actually well off people do usually give money to charity. But how about $100 million to fund a cancer research center in Cambridge, MA which is a unique combination of oncologists, biologists and engineers, etc? How cool is that? I have heard about this research center for a while now, but I didn't know the whole story behind it.
Kudos go to Mr. Koch for helping fund this unique cancer research institution. I have great hopes that a new focus in combining the different types of researchers into one center together will bring new ideas together. We need more money spent on cancer research and less on cancer awareness and I think this is a great example of it. There are plenty of political activists out there but there is not enough cancer research.