Global Super rich have $20 trillion hidden in tax havens
"The global super-rich have $20 trillion hidden in tax havens according to one estimate made by the Tax Justice Network."[DF- International tax evasion by the global super rich and criminals is estimated to be over $20 trillion][DF- The international policy agreement Multilateral Convention on Mutual Administrative Assistance in Tax Matters (MCMAATM) is designed to enable withholdings information sharing between nations. but so far only 30 countries have agreed. Several former british colonies have technically agreed under default as British colonies, but tax evasion remains unenforced]
Baird, Rachel. November 2013. Tax Haven Standoff. New Internationalist. Page 10-11. http://newint.org/sections/agenda/2013/11/01/tax-haven-stand-off/
http://www.christianaid.org.uk/ActNow/trace-the-tax/