What’s the difference between an armed museum guard and an armed bank guard? Is money more worth dying over?
Faulkner said “The “Ode on a Grecian Urn” is worth any number of old ladies” and I agree. If a couple old ladies or toddlers or girl scouts get caught in the crossfire, that would be unfortunate, but a perfectly acceptable loss.
Nothing, but in most banks in North America, bank staff members are trained to cooperate fully with robbers to avoid placing themselves or customers in danger. No shootouts with security guards.
After studies done in the 1990s new security programs in place and a primary procedure is to not interfere physically or engage the robbers in any way (that includes running out to see a licence plate). The robbery prevention programs are instead more subtle, prevent violence and increase police response time.
The studies were done in response to the fact that although the number of heists seemed to be going down the level of violence (shooting, hostages etc.) was increasing.
You can read about a Canadian study here but banks in the U.S. have adopted similar styles of robbery prevention programs.