I was in the post office the other day. Understaffed and security cameras bigger than a shoe box. I did see a newer WiFi enabled webcam there, but it looked out of place.
I think the Post Office makes an excellent choice (in theory) for banking. There’s almost one post office in every town, it can have better rates than traditional banks (through legislation or rules), and could be just as safe as a traditional bank.
Then again the government will kneecap this somehow and fail the program.