You searched for: “arithmocracy
arithmocracy (s) (noun), arithmocracies (pl)
A form of government in which power results from the group that holds the numerical majority in a country: An arithmocracy can be a good form of government, or it can have negative results, depending on whether there is a balance between governmental rule and individual liberty.

If someone with arithmocracy wants to do away with criticism of the government with the hope of assuring national harmony, it would not get by with passing a law forbidding the media or private citizens from openly challenging any political decisions!