https://www.brookings.edu/articles/house-republicans-want-to-cut-the-irs-budget-again/
https://www.eca.europa.eu/Lists/ECADocuments/SR22_17/SR_External_consultants_EN.pdf
https://blogs.lse.ac.uk/europpblog/2022/08/17/threats-and-solidarity-in-the-eurozone-how-italian-and-german-citizens-respond-to-information-about-italexit/
https://taxfoundation.org/flat-tax-state-income-tax-reform/