Both Brown and Buchanan were taking part in what Brock and his team viewed as an experiment that could change the power balance in politics. The experiment was wildly successful. But it should be noted that neither Buchanan or Brown showed the least gratitude for what had been done for them.
Ross Perot, who owed his own surge to a similar experiment carried out on his behalf showed exactly the same amount of thanks.
Character, and the lack of same, always becomes obvious.