Google and Yahoo! turn up no futarchists and nothing about futarchism or futarchisms. Are you a futarchist?
What are the implications of the Lucas critique for futarchy and prediction markets generally, or social policy bonds? Putting Your Money Where Your Mouth Is: Acquiring And Aggregating Costly Information From Sources Of Differing Quality (2006; PDF) mentions in passing:
There is a third theoretical doubt, a type of “Lucas critique.” If a prediction market becomes reliable, and this reliability changes policy or politics, this creates strategic incentives to manipulate the market. If the strategic incentives are strong enough, they could oﬀset any monetary losses incurred by the manipulators.
I suspect the implication is that although making sense of prediction markets seems a little harder the critique probably applies more strongly to bureaucratic goal setting, making market mechanisms look relatively better than in absence of the critique. That’s just a wild[ly biased] speculation.