Betting markets in everything

Will Congress approve a bail-out package for banks before September 30?  Right now the contract is selling at about 79, which usually translates roughly into a 79 percent chance of approval. 

Note however that the marginal utility of money here does differ across worldstates.  Assume that the marginal utility of money is higher (people are poorer) with no bail-out.  That makes some people want to bet against the bail-out as a form of insurance, thereby raising the price of the "no bail-out" contract.  (Addendum: that was bad phrasing — no one has to intend insurance as long as the MUs of money differ across the world-states.)  In other words, the real implied chance of a bail-out is higher than 79 percent.

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