> Thus if you are a rich person trying to donate a lot of money to a truly good cause the charity will sometimes be forced to refuse your money despite needing it - just to keep the IRS away.
I would be very surprised if this is true for most legit charities. I am pretty involved with a couple of 501c3s and I do not think any of them would turn away a valid donation from a reputable individual out of fear of the IRS.
>>takino+(OP)
Not all charities have the problem. Size compared to donation size matters. Charities that don't do things for donars probably don't have a problem.