"Quisat Custodies ipsos custodes" is a fragment of s rant by Juvenal and what he means is that your wife will be such a slut that she'll bribe the people you pay to watch her so she can screw everything that moves. Possibly including the watchment themselves. He's saying you can't trust women. It's not a comment on how to run a government.
It's still appropriate, but you should know where your quotes come from.