When you actually conduct the experiment -- a randomized controlled trial where you give some poor people cash and others in-kind services, the cash group outperforms.

None of the above links appear to support it. Please let me know if I'm mistaken, otherwise please do provide a relevant citation. Like many others here, I'm genuinely interested in learning about such a study.

http://www.sciencedirect.com/science/article/pii/S0304387813...