We reward authors of solutions with intellectual property rights.
This is in a way could be practical, because if we were to give money or acknowledgements to all of the sources of solutions that we enjoy, it would take tons of money for each individuals.
Therefore, because they've made the world friendlier for us, we also would make the world friendlier for them, by respecting their terms and conditions, and the law that maintains their properties and the mutuality that we enjoy.
Therefore I say that poor people who are not hostile but keep on inspiring, keep on being friendly to others, even though they don't have a job or like that, are those who are working.
The same way we respect our sources of solutions, making their world friendlier, give them intellectual property rights, obey their terms, etc... the same way these poor people are rewarding us by being friendly, lawful, and inspiring.
So these poor people are also my sources of solutions.
We don't have to pay with money all the time to make other people's world friendlier, we respect the law, we respect their interests, that's a form of payment too.