Makes sense. A wallet with nothing in it isn't worth going to the trouble of tracking down the owner. The more valuable it is, the more important it is to find the owner.
It's worth treating the opinion makers, business leaders, economists and politicians who say otherwise with deep suspicion. Such people are probably the type who'd rob you of your last penny if they could get away with it and just make themselves feel better by saying everybody is as bad as they are.
Really, most of the people I've met in my life were pretty good at heart, even if flawed, but the very worst have nearly always been those who complained the loudest about how rotten and bad everyone else was. Some are depressed and that's different, but the rest were often people describing themselves really. Just bad people making out that everyone is bad to justify their own nastiness.