This is purely an observation, but over here if a beat cop is similarly negligent, the worst case scenario is a lawsuit for wrongful arrest. We did have the Jean Charles de Menezes atrocity in 2005, in which criminally shitty surveillance coupled with a controversial shoot-to-kill policy (imposed by Sir Ian Blair after he saw it while on holiday or something) resulted in one dead innocent man, followed initially by shabby attempts at a whitewash. However, cases like that can be counted on the fingers of Abu Hamza's bad hand. If our police were to be armed as a matter of course there would probably be an uprising of some kind.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'