Earlier quoted context omitted.
And the naysayers would be right. They come from two approaches: - Property rights: bettors are waging using their own property at their own direct risk. To prohitbit such a thing is to violate their property rights, plain and simple; - Information aggregation: prediction markets originally appeared to help make informed decisions about an event by proof-of-stake. If I'm not mistaken, this idea was originally develop…
> bettors are waging using their own property [...] To prohitbit such a thing is to violate their property rights This is technically true but doesn't deserve top-billing. Any fraudster or embezzler (or mugger or drunk-driver) will incidentally be risking some of their own property while exercising their right to control it. > informed decisions about an event by proof-of-stake A large chunk of the problem here occur…
Onto the second, I don't think the people you mentioned actually wager stuff that they don't own. To be more precise, the problem is that they use criminal means to "rig" the bet in their favor. That, at least, seems to be what OP is talking about with incentives.
Finally, regarding the last, I agree that roles that require trust should have more norms and rules to enforce that trust. In case of strictly private roles, I personally believe they should be done via contracts and cultural pressures. For governmental roles, they should be enforce by laws (such as the one you suggested). Since this is a top-level, abstract, description, we can get into more about more specific cases (such as CEOs).