You open this post with "If a government was to be enhanced or replaced with an AI" as if these were options that would have a similar outcome.
Of course government will be enhanced with AI, there are already numerous examples of the application of Narrow AI being used in this way. As long as these implementation are limited to NAI solutions under direct human control then considerable benefits and efficiencies can be achieved, not least being 24/7 surveillance of your every move, every word you say and every piece of data that passes through your router. And all nicely aggregated, categorised and stored as evidence against you if, or more likely when, required.
But to consider replacing human managed government with Artificial Generalised Intelligence (and eventually Superintelligence)? Please think this through before giving it your support.