List believes so strongly in incentives that he offers his own children lottery tickets to do extra math homework, he says. He promised a daughter a trip to Disney World in exchange for her becoming potty trained. The day he made the offer, she used the toilet and was trained, he says.
OK so having investigated this, I'd say a trip to Disney World is going to cost you between $1500 and $3000 depending on how you do it. I think List overpaid.