The watchmen watchers of course who are watched by the watchmen watchmen watcher watchers who are...
You get the idea.
It's actually supposed to be the electorate in a democracy as they have the power to vote in the people that serve the people and act in ways that are for the people.
What we actually have is 3/2 party system where laws that are not for the people and actually against the people traverse the parties leaving us with no power to stop it or get them reversed at the next election.
In summary politicians are self serving leeches who make the vogons look good.