it's sad to think that "society" has gone this way. I remember a fair few years back exdh & I went to sit at a table in the garden of our local, and found a £10 note on the ground. I took it into the pub, and was told by the landlady that some friends of theirs (who were not exactly flush for money) had been sitting there, had come out for the first time in ages etc. Of course it may have been a load of old whatsit, but my first reaction on finding it was to hand it in!
Even more years back, when I was about 10, I found a cigarette lighter (well before the days of throwaway ones!) next to a bench. I took it to the police station and handed it in. As it wasn't claimed after whatever was the statutory time in those days, the police contacted me and said it was now mine! I seem to remember doing the same with a necklace, probably fake pearls but with a very pretty clasp, same thing happened and I was so proud of it!
Perhaps I was just a very honest child, and then (referring back to the £10 note) a very honest or gullible adult?