Quis custodiet?

being an avid Watchmen fan, I have always liked the famous quote from Juvenal's Satire VI:

"Quis Custodiet, ipsos custodes?"

What tickles me pink is that this is often used to question our trust in military and police power. Juvenal was actually using it in a far cruder context, as per the below:

"audio quid ueteres olim moneatis amici, 'pone seram, cohibe.' sed quis custodiet ipsos custodes? cauta est et ab illis incipit uxor. iamque eadem summis pariter minimisque libido, nec melior silicem pedibus quae conterit atrum quam quae longorum uehitur ceruice Syrorum"


"I hear all this time the advice of my old friends--"Put on a lock and keep your wife indoors." Yes, but who will ward the warders? The wife arranges accordingly and begins with them. High or low their passions are all the same. She who wears out the black cobble-stones with her bare feet is no better then she who rides upon the necks of eight stalwart Syrians."