Any question answered...

Pubs are too busy serving ale to spivs, the bookies are too busy selling bets to those that can least afford it and all the shops are too busy chasing shoplifters. That leavers just butchers, hairdressers and a few others able to diversify into key-cutting. Butchers are harassed maniacs with sharp knifes. Any key cut from their chubby hand would be too roughshod, and likely covered in their blood and that of a cow. A customer would complain about this, I suspect.

A hairdresser is too busy daydreaming about next Saturday night out to care about your keys, or your hair. Their career is a permanent audition for the day they're plucked from the obscurity of a salon to the glory of a theatre stage, where they can make graceful swipes with a pair of scissors and toss about a comb as if it's a scalding hot iron-rod, in front of an audience with perfectly good house-keys already in their suburbia-creased trousers. Plus hairdressers live with friends only because they're incapable of opening a locked door on their own - wave a key in front of their nose and they'd look more gone out than usual.

Heh :)