Or you could just have strong (and enforced) laws that greatly limit how much power politicians have and then you wouldn't have to keep all these additional lay

Or you could just have strong (and enforced) laws that greatly limit how much power politicians have and then you wouldn't have to keep all these additional layers of corrupt politicians, institutions and government bureaucrats fighting with each other about who gets to be corrupt every 4 years. How to achieve that is left as an exercise for the reader :)