After thinking long and hard about all the economic models he had studied during his time on Earth, Daneel had come up with this model whose success was dependent on the capability of those to whom he gave this loan.
He had actually been inspired by macroeconomics, which had been hailed in the beginning of the 20th-century as the tool which would end world hunger.
Yet, as the years went by, this claim became challenged more and more until it was completely overturned by research which showed that macroeconomics was 'an' answer, but definitely not 'the' answer.
Macroeconomics basically meant giving small loans to people who are in need of them, usually without taking any surety.
This was all well and good in the cases of those who did honest work and paid back what they had been given.