Here are the salaries of 13 major world leaders

[Damien]

Salary is a very big motivation for performance and motives in general. I am very sure they have their own KPIs, how well they rule the country is also affected by them. If they are not motivated, then I do not see the support for high salaries in the first place.

If you are saying giving huge paychecks will help minimise corruption and retain talent. This implies that the presidents earning substantially lesser are not as competent and corrupted.