You forgot to add the gate cards to the discussion, LOL. I do not see the good of spending money on the gate guard (person), the card access thing and so on. Yes, in some places they stop the speed demons against the speeding golf carts at those dangerous intersections, supposedly. The security cameras should (in theory) take care of the above if monitored from an operations center by the same people with access to the gate arms (being replaced often, LOL)?
Do we really need Gate Cards?