We can certainly lower the rewards for street robbery while keeping the risks high; Apple took a pretty major step already.
Let's hope street robbers don't start kidnapping people and milking the balance out of their accounts over a few days rather than just robbing cards.
http://www.theargus.co.uk/news/2382134.print/
http://www.dailymail.co.uk/news/article-400032/Teenager-kidn...
http://www.chesterchronicle.co.uk/news/armed-gang-kidnapped-...
...Or, they have no fucking clue and will just take everything you have on you because they're mugging you :-)