Pick leaders at random. (Score 1)

Pick the leaders at random with no option to stepdown, and severely punish underperformers by democratic voting.

Pickable people will have to prepare themselves for the task and every aspect of it well or they will suffer!. Additionally, being picked does not get them any tangible benefit or money during the tenure, only until the end without being punished, and they loose it all if punished.

Pros .- Increased voting (everyone wants to cause other people pain)
Cons .- nobody will want the job, but in all honesty, everyone wants to be president because the benefit / investment ratio is close to infinite...