Power corrupts, end of story. Democracy (limited terms), taxation and anti-monopoly regulation are examples that show a path to cure the disease. Nobody should be trusted with too much power for too long.
Sortition may be what you're looking for: "sortition is the selection of public officials or jurors at random, i.e. by lottery, in order to obtain a representative sample". No one can amass power because it's short term and random. https://en.wikipedia.org/wiki/Sortition
[0] https://www.goodreads.com/book/show/217981747-lottocracy