Shill Bidding

[Yoda]

I am really naïve about the nuances of shill bidding, not that I really want to know too many details, but am curious about the end game with a major card
in a major auction with a major auction house. (Harvard Business School has assuredly already picked up on the Mastro debacle as a good case study.) Presumably, a shill bidder if his bid won the auction would be held harmless by the consignor and be reimbursed for winning. Some kind of side agreement, I suppose. If there are more things more egregious than paying more for a long coveted card because the price has been driven up by greedy, unfair means, then I can't think of it at the moment.