Yes. The whole thing is silly. At the first attempted mugging:

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>MUGGER. Here's the thing: there is, clearly, more utility in me keeping my finger than in you keeping your measly ten pounds. So there would be more utility in the world if you gave me the money than if you didn't.

A better response than what was given is:

"No, I am giving the money to stop a child from starving, so cut off your finger you stupid bastard."