Vroom and Maslow
I find that there is no conflict between the expectancy theory of Vroom and Maslow's. In this age of the knowledge worker, where knowledge represents the ability to use information productively, one's motivation will be essentially dictated by the intensity of his needs and his expectancies.
Nobody works for nothing, whether it is money, or recognition, or self-fulfillment. If the highest expectancy rests on the deepest need, it will surely be a driver for exceptional results. Putting it backwards, as Lebeouf states it, what gets rewarded gets done.