Honestly, proper bank robberies are pretty rare. They’re seen has high risk targets. And in the modern age, most branches do not carry much cash, anyway.

So in short, paying a guy to sit there costs them way more than they stand to lose via robberies.

Isn’t that just a “how much do they yap” meter? A quiet person who lies can compulsively will have a lower number than a socially active person who tells occasional white lies.