The FT link above is worth reading... including
" The plan is for the US$400bn that could be generated by a global Robin Hood Tax to be split equally, with $200bn spent domestically and $200bn spent around the world.
Of the money spent globally, $100 billion would go towards international development and US$100 would support developing countries as they adapt to climate change.
The $200bn to be spent domestically would make serious inroads into tackling the structural factors that mean more than 13 million people in the UK live in poverty
Sounds great. Except, umm, why would the $200bn be available to the UK? Surely it would be divided between the whole world? Would Britain get half on the grounds that the City dominates foreign exchange, the biggest international market? No. How much would it get?
6.7bn people in the world, so $29 each (no, I didn?t do that in my head). Alternatively, if Britain tries to keep all the money, other countries are guaranteed to respond by cutting their ?Robin Hood? rate, to attract the City?s business - it is highly mobile, after all. If all Britons get is $29 each, at the risk of destroying the City, that isn?t worth it. If there was a way to secure $200bn, or $3,278 each, that would be great - but there isn?t.
On top of that, the developing country and climate change money would be put in the hands of the UN. Yes, you heard right: the UN.
Funds would be managed by a UN mechanism, to ensure they are allocated fairly and according to each country?s particular needs.
Expect much corruption in a process overseen by the UN? Well, take a look at the UN-administered oil-for-food regime in Iraq, pre-invasion. According to the US DoD, there were $4.4bn of illegal surcharges (plus the smuggling). A Robin Hood Fund might be differently structured, but with many of its members cocking a snook at the rule of law, what chance would a UN fund have of staying corruption-free?"