https://www.epsu.org/sites/default/files/article/files/EPSU%20Report%20Outsourcing%20state_EN.pdf
https://files.taxfoundation.org/20211014170634/International-Tax-Competitiveness-Index-2021.pdf
https://curia.europa.eu/jcms/upload/docs/application/pdf/2021-11/cp210197en.pdf
https://www.socialeurope.eu/stability-or-stagnation-how-europes-fiscal-rules-are-strangling-growth