I found $150 on exiting the toilets, and handed it to the receptionist. She sent out an email to the whole office, and the owner was found.
From where I come from, if you lose something, and someone else finds it, and returns it, you owe him 10% of the value.
Well, this guy did not even thank me.
Although I know it's illegal and partly immoral, next time I find money in the office, I'm even more tempted to keep it.
I feel for you man. You've done the right thing and it feels like you've been punished for it.
Try and see it this way though - You have forgone a $15 reward to gain information which might be useful in the future. How people react when you do something nice for them says an enormous amount about them. This is an office setting, so chances are fair that you will deal with this guy again. Now you know what kind of person he is, and how he sees you. That could be very important in the future.
I don't know if this is an Australian thing, or a wealthy thing, or what, but one thing I've learned is that people here are very insecure when it comes to accepting help. They say 'thank you' through clenched teeth, then profess wonder at why the world seems such a dangerous and scary place
In all honesty, I prefer your system