Unfortunately, it's not just elected officials that are problematic for prediction markets. The Secretary of War, for instance is not an elected official nor are leaders of the armed forces and there is definitely a prediction market for war. Multiply this by every powerful appointee and every career bureaucrat and see what kind of picture that paints.
If we're not going to ban prediction markets, we could at least make it a requirement that all bets are public and associated with a real identity.
That'd go a long way towards curbing the corruption of these things, while preserving (or even greatly enhancing) their "predictive power."
Seems like you’d get a secondary proxy market popping up overnight. Like domain privacy for degenerates.
That's why you make the regulations like AML regulations, where it's a crime to obfuscate the source of the wager too.
It's also low-ranking members of the armed forces that have a lot more information than you'd expect. If you just banned the high ranking members from prediction markets, I actually don't think very much would change. (There would just be slightly more delay.)
Don't forget relatives, useful idiots, and billionaire special envoys!
The latter two groups often overlap, even