http://www.economics-ejournal.org/economics/journalarticles/2017-18
https://www.brookings.edu/articles/increasing-ssi-benefits-is-a-more-effective-approach-to-reducing-poverty-than-an-enhanced-social-security-minimum-benefit/
https://policyexchange.org.uk/wp-content/uploads/Government-Reimagined.pdf
https://www.iidh.ed.cr/derecho-informacion/media/1079/acuerdoescazu.pdf