Adopt STV for all Government Leadership Positions.
The Single Transferable Vote (STV) is a form of proportional representation which uses preferential voting in multi-member constituencies.
Each voter gets one vote, which can transfer from their first-preference to their second-preference, so if your preferred candidate has no chance of being elected or has enough votes already, your vote is transferred to another candidate in accordance with your instructions. STV thus ensures that very few votes are wasted, unlike other systems, especially First Past the Post, where only a small number of votes actually contribute to the result.
A detailed video is available on the subject by CGP Grey.
https://www.youtube.com/watch?v=l8XOZJkozfI