This also reminds me of the time when I was buying an ice cream in a quite poor village in eastern Europe that cost the equivalent of 5p. I only had the local equivalent of a £1 note and the ice cream seller didn't have any change, so he insisted that I should take it free of charge.
I told him to take the £1, which wasn't really very much at all to me, coming from a privileged country in the west, but he refused, as I suppose, to him, it was a fortune - and indeed 20 times the price of the goods.
There was a touristy UNESCO site a short distance away (that didn't seem short of a bob or two), to which I went to buy some postcards that I didn't want, so as to get some change to take back to the ice cream man, who was overwhelmed and very grateful that I'd returned.
Just goes to show how awkward financial disparities can be - when you're saying "Here, have a quid" to somebody, but, to them, it's like you're arbitrarily handing them a small fortune for nothing.