Brilliant Ideas That Will Never Work: celebrity interrogation for charity

You get a famous but reclusive person who hardly ever gives interviews, and you get them to do a Q&A session. You charge admission to the Q&A session (being a real hard-ass about recording devices), and then auction off the right to ask questions. Top bidder gets to ask the first question, second bidder gets to ask the second question, etc. etc. until time is up. The size of the audience and the duration of the event should be such that only 10-20% of the audience gets to ask questions, and if possible a live bidding system should be set up so people sitting in the audience can increase their bids in desperate attempts to get their questions in.

Fatal flaw: finding someone who is sufficiently famous and sufficiently reclusive that people would be willing to pay significant money for the opportunity, but still willing to do the interview.