The Federal Reserve doesn't work that way.
With the passing of the Patriots Act in Oct 2001, all Protection Department staff (guards) at the Federal Reserve, who were very well trained at that time, at least at the Fed in Boston, became Federal Law Enforcement Officers and all went to a Federal Academy for further training.
As for what they protect as a base line - they do not give two squats about the money, never have. Our attitude was, is and always will be, "If they try to get in the vaults, let them. We'll lock them in and deal with them at our leisure."
Even though there was 126 Billion dollars in currency when I left there, nobody gave a damn. Our number one priority was to protect the employees, tenants and guests of the Federal Reserve. That's how we were trained, that's how everyone is trained at all the Federal Reserve Banks, system wide. Money is replaceable, human life is not. And if you tried to hurt any of our people or guests, that would be one quick mistake and very short lived. Condolences to your family.
As for it being a government bank, it is not. Perhaps the most unconstitutional entity in our country, it is a privately owned banking system (think Cartel) And it wields more power than anyone else, anywhere.
It's funny how money works. Them that have it, make the rules.