What if the person doing the Turking was submitting crap data? It seems like you'd have to wait at least a couple days in order for the data to be validated.
Other platforms built on turk, such as crowdflower, have systems in place to assess accuracy. Another turk worker checks the quality of the work, or 3 workers do a task, and the best, as judged by a different set of workers, is given a bonus.