"What do you plan to do with the money?"
My answer would be:
"Ahem. First of all, does it really come down to who supports the best charity - or who can best lie about supporting this most worthy charity? Also, there are these words called possessive pronouns. Among them are "my," "his," and "hers." I won't put the money under a rock. If I spend it on myself, I'll buy lots of stuff from a lot of happy people. Sure, I'll donate some to charity. My spouse and I will discuss this because we talk about these sorts of things. That's all I can say at this point."
Sure, it might cost me a vote or the difference between first and second place. But I think it's the right answer.