Everyone should get one vote for every $1000 in tax money they pay. OK?
Starship Troopers is a coming-of-age story about duty, citizenship, and the role of the military in society.[43] The book portrays a society in which suffrage is earned by demonstrated willingness to place society’s interests before one’s own, at least for a short time and often under onerous circumstances, in government service; in the case of the protagonist, this was military service.
https://en.wikipedia.org/wiki/Robert_A._Heinlein