I'd try to remain a benevolent dictator for life with the goal of transitioning to a different government structure which i think is better suited to a post-scarcity economy, with the main principle of governance being an extreme and immutable enforcement on everyone having equal access to information and rights/duties under the law. This would require a gradual phaseout of A LOT of things, such as:
- Fractional reserve banking
- Information classification
- Enforceability of legal waivers
- Intellectual property
- Corporate veil and potentially even personhood
- Progressive income taxation
- Class-specific, Gender-specific, Religion-specific and potentially Age-specific legislation
- Special-purpose computing
- RF spectrum licensing
Government office positions would follow technocracy principles, but act in an advisory role.
Legislation would be done though some variation of quadratic voting, with proposals costing more voting power than a family could accrue in their lifetimes with the intention of minimizing voter fatigue as much as possible. Voting power transfers should be possible, but only in one-to-all scenarios, such as pooling it towards a legislation proposal, maintaining a specific legislation active, or redistributing voting power so as to increase the majority opinion's voting power in a specific vote. Vote duration would be extended when voting power is spent against the consensus in order to mitigate the impact of last-second coordinated voting.
Taxation would change to a tax on a constitutionally-limited portion of capital, and the entirety of land value and externalities. This is necessary in order to ensure everyone fair access to opportunity, as the upcoming automation revolution will bring the cost of labor(and its bargaining power) to zero, with the only remaining factors to production being capital and land. Capital can be increased, but land can't - so the country would have to make the most of its land and taxing its entirety would (per georgist principles) give it an incentive to be used for efficient and productive purposes. The capital tax would be distributed evenly to every citizen as currency. Public companies could pay their tax by issuing new shares, which would also be evenly distributed to citizens. Land taxes would be used to improve the land, ensure deterrence against foreign invasion, and run the government.
The goals behind this are removing as many roadblocks to progress as possible, while providing everyone the ability to improve the country's progress (and most importantly, their own progress) and be rewarded for doing so.
Autocratic powers would be necessary during the entire transition period, and then 1-2 generations where the country would hopefully show significant improvement over other countries and itself to convince everyone the government system is better than the existing alternatives and should be kept that way.
~~Who am i kidding, all of this would realistically get me sanction-blockaded and gaddafi'd by external actors within a year.~~