Civic honesty around the globe

Civic honesty x civic duty, actually. One of the variables you measured was whether that unknown guy's problem is worth my effort to contact them.

I'd guess (out of my ass, of course) that many people didn't steal it but also didn't bother. They just left it there for someone to come and pick it up. And I'd also guess they didn't trust they co-workers not to steal the money if they left the wallet there at the end of their shift, that's why more wallets with money were reported.

Civic honesty and duty cover most of it, I think, in the UK for example.

When I was living in Saudi Arabia for a time as a kid I was told not to pick up money even on the street or I could have my hand chopped off. However much truth there was to that message, I suspect that mentality could colour the results and probably falls outside honesty and duty.