In this scenario, a representative democracy would be best.
Explanation:
In this situation where the head of state has been engaging in corruption it would be good to have a representative democracy or what is sometimes called indirect democracy. In this kind of government people vote for their leaders and they are charged with representing them. The laws in society are therefore representative of the people and the representatives can vote on whether to remove the leader ahead of his term or whether some other sanction is appropriate. There are checks and balances in this kind of system that assures the executive does not gain too much power. It is also unlikely this leader will be voted in for a third term given his corrupt practices.
