The model in the paper seemst to assume the conclusion, but perhaps putting term limits on a dictator, if possible, might help with the general problem: it takes a while for the information getting to the dicator to become badly corrupted, so maybe don’t let anyone stay dictator long enough for that to happen? On the other hand, making the dictator run mostly on priors instead of using power to get access to new information has its own set of drawbacks...
(do not take this too seriously)
The model in the paper seemst to assume the conclusion, but perhaps putting term limits on a dictator, if possible, might help with the general problem: it takes a while for the information getting to the dicator to become badly corrupted, so maybe don’t let anyone stay dictator long enough for that to happen? On the other hand, making the dictator run mostly on priors instead of using power to get access to new information has its own set of drawbacks...